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  1. Trailer Brake Controller
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  4. Proportional Controller
  5. Under-Dash Box
  6. Up to 4 Axles
Tekonsha Voyager Trailer Brake Controller - 1 to 4 Axles - Proportional

Tekonsha Voyager Trailer Brake Controller - 1 to 4 Axles - Proportional

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Trailer Brake Controller
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Tekonsha Proportional Controller - 39510
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Product Expert Kathleen M

Is this right For you? Product Expert Kathleen M says:

Yes, if you:

  • Have a large camper or newer brakes on your trailer and want to avoid any premature wear
  • Tow your trailer occasionally or just for short trips

No, if you:

  • Have hydraulic brakes on your trailer
  • Switch trailers or vary the load on your trailer often and would get frustrated by not having a preset option or number to guide you
  • Like having a clear indicator of the settings like you'd see with an LED screen
Proportional brake controller can be mounted within a 90-degree vertical range. LED monitor indicates braking action of trailer. Fine-tune power adjustment lets you set braking intensity to suit your towing needs. Lowest Prices for the best trailer brake controller from Tekonsha. Tekonsha Voyager Trailer Brake Controller - 1 to 4 Axles - Proportional part number 39510 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (610)
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Tekonsha Trailer Brake Controller

  • Electric
  • Proportional Controller
  • Tekonsha
  • Under-Dash Box
  • Up to 4 Axles
  • Manual Leveling
  • Dash Mount
  • Indicator Lights
  • 90 Degrees

Proportional brake controller can be mounted within a 90-degree vertical range. LED monitor indicates braking action of trailer. Fine-tune power adjustment lets you set braking intensity to suit your towing needs.


  • Brake controller activates trailer brakes in proportion to your vehicle's braking action
    • Automatically adjusts trailer's braking based on deceleration of tow vehicle
    • Activates immediately - no pausing like with time-delayed brake controllers
  • Multiple mounting options
    • Position within 90 degrees in the vertical plane
  • Fine-tune adjustment for braking power and aggressiveness
  • Green LED monitors a secure connection with trailer
  • LED monitor changes color to alert you to braking action of trailer
  • Built-in, slide-bar manual override
  • Plug-in, vehicle-specific brake-control adapter (sold separately) can be used for certain applications to reduce installation time


  • Application: trailers with up to 4 axles (8 brake assemblies)
    • Designed for use with electric brakes only
  • Dimensions: 3" wide x 5" long x 1-1/2" tall
  • Mounting: between -20 degrees and 70 degrees in the vertical plane
  • 5-Year limited warranty

Proportional Braking

With a proportional brake controller, you can get heavy-duty emergency braking, general braking or slow-to-an-idle braking for your trailer automatically. The intensity with which your trailer brakes are activated and the rate at which they are applied are dependent on the deceleration of your tow vehicle. This means that, unlike time-delay controllers - which send the same amount of preset power to your trailer brakes every time - proportional controllers are able to adapt to every braking situation differently. So, if you slam on the brakes in your truck, your trailer brakes will activate with that same extreme intensity. And if you merely slow down as you approach a red light, your trailer will gradually brake in the same manner.

As long as the Voyager controller is mounted properly and is pointed in the direction of travel, it will sense - via an internal inertia sensor - how your tow vehicle brakes. This inertia-based sensor responds to the deceleration of your tow vehicle as you brake by signaling the controller to send out enough power to your trailer brakes so that they are activated with an intensity that matches. The result is uniform braking across your towing setup. No push-pull action - just smooth, proportional braking every time.

Power and Sensitivity Adjustment

Getting the braking power you need for your application is simple with the Voyager. First, set up the controller as indicated in the instructions, making sure that the internal sensor is properly leveled. Then set the overall power by adjusting the power knob while you test out your rig. The power should be just enough to achieve maximum braking without locking up your trailer brakes.

Once you have the overall power set, you can fine-tune the power output by adjusting the sensitivity of the internal sensor. Use the level knob on the side of the Voyager to achieve your desired degree of intensity. Move the knob toward you (clockwise) to delay the power output, creating braking sensitivity that is ideal for lightweight setups. If you are towing a heavy load, you may want the trailer to brake more aggressively to prevent it from pushing your tow vehicle. To get more intense stopping action, turn the level knob away from you (counterclockwise).

LED Indicator

On the front of the Voyager there is an LED indicator that is designed to keep you aware of the braking action of your trailer. Typically, this light burns green to indicate that your trailer and tow vehicle are securely connected. When the light is green, only 5 milliamps are being drawn, thus minimizing drain on your vehicle's battery.

As you apply the brakes in your tow vehicle, the LED will change to red. This indicates that power is being sent to the trailer brakes. The light will also burn red whenever you activate the manual override lever.

During installation and setup, this light is used to ensure that the Voyager will be able to function correctly. Proper leveling of the internal sensor is crucial to the operation of this brake controller. When the sensor is level, the LED will change to a shade of orange.

Simple Installation

The Voyager is designed to be mounted in your cab at a vertical angle that is between -20 degrees and 70 degrees.

Correct Voyager mounting90-Degree Voyager mounting

Note: The Voyager must be mounted on a level horizontal (side-to-side) plane and must be lined up with the direction of travel for the internal sensor to function properly.

Once the controller is mounted, you must level the internal sensor. First, set the overall power to maximum using the knob on the side of the controller. Then, while pressing the tow vehicle's brake pedal, adjust the level knob on the other side of the brake controller (this is the same knob that is used to fine-tune the power output) until the LED monitor is a shade of orange.

Installation requires that you either purchase a custom wiring adapter designed to plug into the Voyager or that you hardwire the controller directly into your vehicle. To hardwire the Voyager, you must remove the plug at the end of the integrated wiring harness.

Installation Accessories

For easier installation, a vehicle-specific wiring adapter (sold separately) is available for most newer trucks and SUVs. One end of the custom adapter plugs into your vehicle, and the other end plugs into the controller - no hardwiring required.

Note: If a custom brake-control wiring adapter is not available for your vehicle, one of the following will be required:

20-Amp circuit breaker (9506P - sold separately) for 2- to 4-brake applications

30-Amp circuit breaker (38630 - sold separately) for 6- to 8-brake applications

See also's exclusive 7- and 4-way brake-control installation kit (ETBC7 - sold separately) if you don't already have a 7-way plug at the back of your vehicle.

9030 Tekonsha Voyager Electric Brake Control

Item # 39510

Installation Details 39510 Installation instructions

California residents: click here

Customer Reviews

Tekonsha Voyager Trailer Brake Controller - 1 to 4 Axles - Proportional - 39510

Average Customer Rating:  4.8 out of 5 stars   (610 Customer Reviews)

Proportional brake controller can be mounted within a 90-degree vertical range. LED monitor indicates braking action of trailer. Fine-tune power adjustment lets you set braking intensity to suit your towing needs.


The Tekonsha Voyager trailer brake controller works well in my 99 Silverado 1500, which was easy to setup for my trailer. The option to allow for different settings of aggression for the trailer braking has allowed the stopping with different loads to be graceful with the turn of a knob. Decided to install the controller in CD storage with velcro for a nice look. Easy access when in place during use for easy observation and twicking during operation. The wife can assist with the twicking while I am driving. Excellent product!

The Voyager unit has been working flawlessly this past year. Excellent product that keeps on working!
Gary P - 12/27/2021


etrailer makes the purchase easy. I have always used Tekonsha Voyagers, and on my new truck (2015 Silverado) I also wanted the convenience of having the plug and play wiring harness. etrailer had exactly what I needed and was very easy to find on the website. Installation was flawless and clean thanks to the good hardware supplied. Very excited to put some trailers behind the truck with the stopping power confidence that comes with the Voyager.

Working great! The mandatory leveling process was successful and the unit functions as intended.
Corey M - 09/23/2021


Last year I traded my Silverado for a Yukon to tow my 21’ camper. The hitch tube was integrated into the Yukon bumper and those 20” wheels raised the tube height 7”. I purchased your 13” drop shank to level my hitch/camper connection but experienced trailer “sway” because of that long shank. I fabricated a set of “sway bars” to tame that movement. Now I can tow my camper safely. Thank you for making this long drop shank available for taller tow vehicles!


Difficult to adjust. It would grab too hard, so I would adjust the power and/or level down, then the trailer was pushing me. Adjust up, then it grabbed too hard again. After a few months of very light use, it started grabbing very hard even with the power and level turned way down, although that may have had something to do with the fact that water got into my 7-way plug and made the controller come on when nothing was connected. I strongly recommend upgrading to the primus or other model with digital voltage display and boost function. I have a primus now, and it performs much better.


Very easy to install. Mounted on lower dash and ran the harness under dash tucked away with some zip ties. Everything was plug n play into factory harness on a Nissan Titan So far works as should , have about 20 hrs trailing use. I would buy again

Works great used every weekend trailering race car make sure to get harness w controller. Very easy to install plug n play Nissan Titan
William - 10/26/2021


Excellent product, install went great following the video on Shipping took longer than estimate at checkout, but still made it. And just having it in stock made etrailer better than my local store, which did not.


I was looking for a basic controller to activate the trailer brakes on my Rockwood 276HW pop up, after spending an excruciatingly stressful weekend adjusting brakes/bearings. I found it w the Voyager which, with the previously reviewed harness/connector, attached to the built in connection on my 2020 Tacoma flawlessly. A no-surprise product with the installation made easy w thorough instructions. Brakes work great. Very happy!


Completely plug and play installation and works flawlessly, very happy with this unit. I also ordered the exact harness for my 2005 f150 with tow package. Here are a couple of hints that may be helpful. My installation also required a 30 amp cartridge fuse to be installed in the fuse panel in location #105(electric trailer brakes) under the dash on the passenger side. I also installed a relay in location r05 (trailer tow battery charge) but I don't think this is needed for the controller to function. I still had the original trailer brake kit and it had the additional fuse panel instructions and the relay. The owners manual showed where the 30 amp fuse and relay plugs in. You cannot test this unit until a trailer with brakes is connected, ie the led will not light up until it senses a brake circuit.


This was an easy install on my 2019 GMC truck using the appropriate wiring adapter. Instructions for setting up the control were clear. After a few adjustments my trailer brakes worked as they should. Minor adjustments of the controller are needed from time to time, but overall the controller is reliable. Good value.


Definitely was surprised with a base model controller. I ordered the product and it arrived much sooner than I expected with the correct wire. Very satisfied. Will be trying it out very soon.

It works well. No issues 1 year in.
Karl - 05/11/2022


I have a 12 ton backhoe pro trailer it has 4 short axles 2 on each side. It does not have dual wheels. It has 8 wheels with 8 sets of brakes so I needed a controller for 4 axles. This controller has worked well the settings are a little touchy but it works great. My truck is a 4 speed and i usually have the controller set so if I let off of the gas like coming to a stop the controller slows the whole rig without touching the brake. I like the indicator light to see what it is doing and that it is connected right


This is my second Tekonsha; I had to replace my 10-year old one after I accidentally broke it.

This one is a bit of an upgrade, and is easily able to lock up the disc brakes on my 15,000 lb trailer. Adjusting it properly, I'm able to brake as though there were no trailer at all. Set it, and forget it. It doesn't get any easier than that.


Installed in my 2018 Silverado Custom. I ordered the additional wiring harness and the install took less than thirty minutes. Plug and Play at its simplest. Thank You etrailer.


This controller is outstanding in how easy it is to setup. I upgraded to this model after I had wiring problems with a less expensive unit. etrailer staff was outstanding in their support helping me with that problem and allowing me to upgrade to this controller.


The product was easy to install with the help of the F-250 adapter. I followed the direction and the product worked just as it was advertised from If I had to give the Tekonsha Voyager Trailer Break Controller a star rating from 1-5, I would give it a 4.5.


Received this yesterday and was able to install it today. Instructions were very easy to follow and the only problem I had installing it was contorting myself to install the bracket. Once I got the bracket in place the rest was a piece of cake. Went for a test drive as the instructions suggested and did have to tweak it a little but it's doing exactly what I expect it to do. I'll be hauling a John Deere Tractor and wanted to make sure the brakes on the trailer worked.


Works great. Gave it 4 stars because no one ever got back with me when I asked a question of how to find the cold side of brake. I finally got answer from Jeep dealer.


So far so good. I was able to easily install in in my 2010 Silverado following the video how-to, and have the initial settings done. I'll have to do the fine tuning when I use the trailer, but everything looks to be operating as expected.


Very ez to install, took only a few minutes. After minor adjusting, worked perfectly. Very pleased with this item.


It’s been about a year and still working as it should.
I’ve purchased several tekonsha brake controllers with
No issues.


Easy to install and mount. Instructions are thorough and detailed. The set-up instructions for adjusting are very helpful too. I watched the you tube video on the installation of this controller in a Truck the same make, model and year as mine. Thats what convinced me to purchase it, I was not disappointed, but am very pleased, works great!


This is a simple and very effective brake box. This is the second one I’ve owned, never had any issues.


Bought this to replace a Tekonsha Prodigy P2. Changed the mounting bracket and it plugged right in. Easy to setup and it works. The P2 is being moved to a new truck.


Find a good out of the way location and the install is easy with the additional pigtail. GMC has the wires included in the harness. Just a matter of connecting them


Provides braking as advertised. The mount is a bit obtrusive and permanent. If you're looking for a smaller form-factor or the ability to move between vehicles, look at more expensive models.

Show More Reviews

Ask the Experts about this Tekonsha Trailer Brake Controller

  • Why Are My Brakes So Sensitive when Using My Tekonsha Voyager Brake Conroller?
    I am so sorry to hear about your Tekonsha Voyager # 39510 controller! One of the first things I suggest is to inspect the 7-way connecter you have on the vehicle side and the trailer side to see if there is any corrosion or debris in the pins. Also, it is important to inspect the wiring for frayed wiring and to make sure the ground wires are both attached properly.
    view full answer...
  • Troubleshooting a Tekonsha Voyager Brake Controller that Doesnt Activate
    I am assuming that by change the brakes you mean they aren't activating when they are supposed to. I would follow the setup procedure in the installation instructions to the right that I attached. You want to be certain that the controller sensor is properly leveled. Another possibility is that the red wire (stoplight circuit) of the brake controller isn't attached to the correct circuit securely. You will want to verify that the red wire is securely attached to a circuit that sees voltage...
    view full answer...
  • How to Wire a Brake Controller in a 2007 Toyota Tundra
    For installing the Tekonsha Brake Controller # 39510 in your 2007 Toyota Tundra you will need to use the green and white wire for the stop light circuit. This will get run to the red wire of your controller. The solid green wire won't be used at all. From your truck the black with red tracer wire will get run to the black wire of the controller. The brown wire from truck will get run to the white wire, and the red wire will run to the blue wire.
    view full answer...
  • Troubleshooting Tekonsha Voyager Brake Controller that Wont Light Up Orange Indicating it is Level
    It could be that the Tekonsha Voyager # 39510 that you have is not leveled properly from side to side and that is why you can't get the light to turn orange. You need to make sure that the controller is level completely from side to side. See attached picture. The other possibility is that you have a short on the brake output circuit of either your trailer or tow vehicle. Typical things that cause this are corrosion on the trailer connectors or an exposed wire somewhere between the brake...
    view full answer...
    Image 1 for
  • Troubleshooting Low Brake Output Circuit Voltage on Trailer Wiring
    The more resistance a circuit has the more the voltage will drop. The longer the wires are on a trailer the more resistance is put on the circuit. What I would recommend you do is check the conditions of all of the connections of the brake output circuit from the trailer connector all the way back to the assemblies themselves. If there is unnecessarily long wires anywhere make them shorter. If the trailer connector has 13.7 volts and then from there to the junction box it drops down to...
    view full answer...
  • Experiencing Low Voltage on Tekonsha Voyager Trailer Brake Controller # 39510
    A proportional brake controller senses when and how your tow vehicle brakes with an internal inertia-based sensor. This sensor responds to the deceleration of your tow vehicle as you brake by signaling the controller to send out enough power to your trailer brakes so that they are activated with an intensity that matches. The result is uniform braking across your towing setup. If you are getting the 2 volt reading when the brake pedal is pressed, this is a result of the trailer brakes requiring...
    view full answer...
  • Troubleshooting Tekonsha Voyager that the Light Goes Off when Lever or Brakes are Applied
    That means you have a short on the brake output circuit. This is the circuit that carries the voltage from the brake controller to the brake assemblies. Typically corrosion on the trailer connectors is to blame for this. Cleaning the connectors inside and out usually will solve this problem. Aside from that you will need to check the wiring starting near the connectors checking for shorts and fixing them as necessary. Cut or exposed wires near the connectors are usually to blame for this. I...
    view full answer...
  • LED Light on Tekonsha Voyager Trailer Brake Controller # 39510 No Longer Lights Up
    Normally LED lights (light emitting diodes, actually) have a very long lifespan, far longer than standard incandescent lights. Usually an LED in a device will last longer than the device itself. Despite this it is still possible that the LED on your Voyager brake controller has simply burned out. If the trailer brakes are operating properly and in all other respects the controller is working normally, then this is likely to be the case. If your Voyager is still within its 5-year warranty...
    view full answer...
  • Voyager Trailer Brake Controller Does Not Show Green Light with Trailer Connected
    You have done some thorough testing which makes my job easier! I do not think it is the trailer brake magnets but rather the controller. To make sure what you can do is sever the blue wire about 6 inches from the back of the controller. Then use your tester to test the end of the blue wire coming out of the controller while applying the manual override. If it does not show power or if it shows power all the time (with or without the manual override on) then the controller will need to be...
    view full answer...
  • How Does a Tekonsha Voyager Brake Controller Work When Towing Trailer
    Brake controllers are designed to apply the brakes of a trailer in a smooth way that allows the towing vehicle and trailer to stop as efficiently as possible while minimizing wear on the braking components on the trailer and truck. A proportional brake controller like the Tekonsha Voyager that you referenced is designed to sense the amount of braking the tow vehicle is applying via it's inertia sensor and apply the proper amount of braking power on the trailer brakes. For more info on...
    view full answer...
  • Circuit to Use to Power Third Brake Light of a 2010 Chevy Silverado
    If you are looking to power the third brake light of a camper shell 7-way wiring is not the correct place to track down this circuit. In the brake controller wiring under the dash of your 2010 Chevy Silverado there will be an orange wire labeled CHMSL. This is the correct circuit to use to power the third brake light of your topper. You can also try tracing the factory wiring harness that plugs in rear of the 7way. Remove the wire loom and a few feet back you might find a light blue...
    view full answer...
  • How to Install a Brake Controller in a 2007 Chevy Tahoe
    Yes, the Tekonsha Voyager Trailer Brake Controller # 39510 that you referenced is compatible with your 2007 Chevy Tahoe. To see how it would install check out the install video that I attached that shows a similar brake controller install in a similar Chevy Tahoe as yours.
    view full answer...
  • Troubleshooting Brake Controller in a 2000 GMC Sierra that Isn't Sending Voltage to 7-Way
    If you tested the brake output circuit near the brake controller and you are getting voltage but it's not making it to the 7-way at the rear of your vehicle then yes, the problem is on the wiring somewhere between where you tested it and the 7-way. UNLESS you haven't made all the needed connection under the hood of your 2000 GMC Sierra to complete the brake controller wiring. Check out the help article I attached that details the connections that need to be made. I also attached an install...
    view full answer...
  • Troubleshooting Poor Braking on a Tandem Axle Trailer with the Voyager Brake Controller
    Based on the issues you are experiencing, I would lean towards a ground issue as well. Ground problems frequently appear when power output changes. I would first inspect the ground connection for your trailer connector. Make sure it is secured to a clean and bare surface on the trailer frame. Next, move to the ground connections for the brake assemblies. Again, make sure they are clean and attached to a bare metal surface. Aluminum frame trailers do not provide the best ground to complete...
    view full answer...
  • Does Voyager Trailer Brake Controller Use Illumination Wire on a 2008 Ford F-150 Factory Harness
    Aftermarket brake controllers such as the Voyager # 39510 do not use the illumination circuit. You can just cap off this wire and stow it out of the way. The brake controller uses white for ground, black for 12 volt power, blue for output to the trailer brakes, and red for input from the stop light switch. Your Ford harness should have one of the following 2 configurations: Pink for 12 volt power Red for input for stop light switch White for ground Blue for output to trailer brakes Brown...
    view full answer...
  • Installing Reese Pilot Brake Controller on 2007 Ford F-150 Using Factory Brake Controller Pigtail
    Over the years, Ford has used two different OE brake controller pigtails. One with a light green wire, the other with a pink wire. If your pigtail has a light green wire, it would wire as follows: Pink pigtail wire to black brake controller wire. Red pigtail wire to red brake controller wire. White pigtail wire to white brake controller wire. Blue pigtail wire to blue brake controller wire. Brown wire on pigtail is NOT used. If your pigtail has the pink wire, it would wire as follows: Red...
    view full answer...
  • Trailer Brake Controller is Putting Out Low Voltage when Set High on a Dump Truck
    The longer distance the power has to travel, the more the voltage will drop. But if the controller is set to the max output then you should have nearly 12 volts at the trailer connector. If you are testing the blue wire directly behind the controller, make sure that you sever it first because otherwise the result could be skewed. If the controller is still not showing at least 12 volts with the manual override this time then make sure the controller is not tilted or turned to the side...
    view full answer...
  • How do You Level the Tekonsha Voyager Braker Controller
    Here are the steps for leveling your Tekonsha Voyager Brake Controller part # 39510: 1.Connect trailer to tow vehicle, Bi-Colored Light should glow GREEN. 2.Set power knob to maximum by fully rotating clockwise. 3.Depress tow vehicle’s brake pedal and hold. 4.Rotate the Level Knob counter-clockwise (towards the back of the control) until the Bi-Colored Light starts to change colors from GREEN to RED. 5.Carefully rotate the Level Knob clockwise (towards the front of the control) until a shade...
    view full answer...
  • Why Doesn't a Tekonsha Voyager Brake Controller Activate Trailer Brakes When Brake Pedal is Tapped
    Yes, the Tekonsha Voyager part # 39510 that you referenced senses braking from your tow vehicle with its internal accelerometer and will send a proportional amount of braking power back to your trailer brakes. Since you said you were traveling between 3-5 miles per hour and where only tapping the brakes the controller wouldn't go and strongly apply the trailer brakes. To test the system better you would want to travel a little faster and apply the brakes harder than just tapping them. The...
    view full answer...
  • What Color Should the LED Indicator of the Voyager Brake Controller be When Driving
    You want at least a slight shade of orange on the indicator of your Voyager Brake Controller part # 39510 when you are connected and the brake pedal is depressed. The darker the orange or red the more aggressive the braking will be. With your foot off the brake it should be green when there is a trailer connected. If the green light is not activating till you drive for a little bit that means you either have corrosion on your trailer connector or you have a loose wire that is making intermittent...
    view full answer...
    Image 1 for
  • What To Do if an RV Dealership Installs a Brake Controller Incorrectly and Damages Cruise Control
    It sounds like the RV dealership that installed your Tekonsha Voyager Brake Controller part # 39510 did not install the controller correctly initially, and even though he attempted to rewire the controller the damage was done to your vehicle and now you have lost cruise control. I would recommend having the mechanic look at the circuits like you are doing, and then once they confirm that the initial install of the controller screwed up your cruise control circuit I would go back to the...
    view full answer...
  • Troubleshooting a Tekonsha Voyager Brake Controller that Only Works with Manual Override Lever
    To determine if the controller is bad (it sounds like it might be) you need to test the wires going into the back of the controller. First and foremost, we need to test the red wire. This circuit should see voltage when the brakes are applied and none with the brakes off. You would want to use a circuit tester like our part # 3808 for this. If you are seeing voltage on this circuit when the brakes are applied and then when you test the blue wire of the controller there is no voltage there...
    view full answer...
  • Brake Controller Does Not Power On After Installation on 2007 New Body Chevy Silverado
    On Chevy and GMC trucks like your 2007 New Body Silverado there can be some connections that will need to be made under the hood to make everything fully functional. I have included a link to a help article that explains the connections that need to be made under the hood.
    view full answer...
  • Orange/Red Wire and Blue Wire Functions on 1996 Chevy C/K Series Truck
    It sounds like you are talking about the tow package wires under your 1996 Chevy pickup. The orange or red wire is for 12 volt power to the 7-Way trailer connector. It powers 12 volt accessories on the trailer and/or provides a maintenance charge to a trailer battery. It connects to the back of the truck 7-Way at the 11 oclock position. The blue wire is output for electric trailer brakes. It connects to the back of the truck 7-Way in the 7 oclock position.
    view full answer...

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