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3rd Brake Light Logic Module

3rd Brake Light Logic Module

Item # PP20-702
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This light module filters out unwanted turn signal input from tail lights to ensure your 3rd brake light activates only when brakes are applied. Required when using a single light as a third brake light. 1-800-940-8924 to order Pacer Performance accessories and parts part number PP20-702 or order online at etrailer.com. Free expert support on all Pacer Performance products. Great prices and Fastest Shipping for 3rd Brake Light Logic Module. Accessories and Parts reviews from real customers.
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Pacer Performance Accessories and Parts - PP20-702

  • Vehicle Lights
  • Third Brake Light Module
  • Pacer Performance

This light module filters out unwanted turn signal input from tail lights to ensure your 3rd brake light activates only when brakes are applied. Required when using a single light as a third brake light.


Features:

  • 3rd Brake light module filters out unwanted turn signal input to ensure your 3rd brake light activates only when brakes are applied
    • Required when using a single light as a third brake light
    • Great for domestic vehicles that typically use single filament bulbs
  • Maximum combined amp draw must be less than 1.5 amps
  • 1-Year warranty


20-702 Pacer Performance Third Brake Light Logic Module

Installation Details PP20-702 Installation instructions



Video of 3rd Brake Light Logic Module

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Pacer Performance Vehicle Light Parts - Third Brake Light Logic Module - PP20-702

Ellen: Hey, everybody. I'm Ellen here at etrailer.com, and we're going to be taking a quick look at the pacer brake logic module. Now, this allows you to add in a third or center brake light on your trailer or your vehicle. So if you want to put this on an RV or really anything else, and you're adding in that third brake light, this allows you to do that. Basically what it does is it allows you to tap into your wiring from the factory or from maybe a four-pole wiring harness, and it'll filter out the turn signals so that you're not getting a flash on that center brake. You're only going to get the brake signal, so it only comes on when you hit the brakes, rather than coming on if the turn signals are activated.So it just is pretty simple to wire up.

You might want to watch out for putting too much power through this. Some customers have said that if you put through more than 1.5 amps, it won't work, so just keep that in mind. Will work out pretty well for most LED lights, though, since they have a pretty low power draw.There's just three wires to worry about. The green wire is what's going to actually go to your center brake light, and then you'd want to, of course, ground that brake light out. The other two wires, one is going to go to your right turn signal.

The other is going to go to your left turn signal. It doesn't really matter which wire you use. They're just there to get the signal and then filter it out so that brake signal can work. This little guy is just that kind of the brains of the operation, so you want to make sure that maybe you zip tie this off to some existing wiring or just kind of zip tie it off to something so that it's not bouncing around all over the place, but it should be pretty straightforward as far as that goes.This can be used on any kind of domestic vehicle that uses a single filament bulb. You just really want to use this any time you're using a single light as that third brake light.

So maybe again, you're adding in a LED strip to your truck or another vehicle, and adding in that third brake light function, this allow you to use that and not have it flash.As far as the size, give you some quick measurements here. We'll get about nine and a half inches of wire to work with, call it about nine of really usable length there. And the little module itself, it's just about an inch or 7/8 of an inch long and about 5/8 or maybe 3/4 of an inch in diameter. So pretty small, pretty easy to set up just about anywhere you want to.Now, if you need some butt connectors to go with this, you can find a lot of options here at etrailer.com. I would probably suggest using the pink ones.

Those will be for your smaller gauge wire, which this looks like it's about 18 gauge, so that will probably do you. If you're connecting it to anything that's a little bigger, you probably want to go with the blue, which is for 16 to 14 gauge wire, but you can find all of those here at etrailer.com to go with this install.I hope this has been helpful in deciding if this is going to be the right part for you. We do have a lot of other lighting accessories and wiring here at etrailer.com for all kinds of stuff, so check it out. Thanks for watching.

Customer Satisfaction Score:


Customer Reviews

3rd Brake Light Logic Module - PP20-702

Average Customer Rating:  4.3 out of 5 stars   (118 Customer Reviews)

This light module filters out unwanted turn signal input from tail lights to ensure your 3rd brake light activates only when brakes are applied. Required when using a single light as a third brake light.

by:

I have a small camper trailer and added a Haloview CA115 backup camera and light combo. I wanted the light to work as a center brake light. This fit my needs exactly and was supper easy to wire in. Could not be happier.



by:

I have always been happy with everything I have purchased from etrailer. I bought this for purposes other than its intended use. I had a trailer I pulled with my motorcycle that had some alternative wiring and some neat lights (hence not wanting to require it) that I needed to build and adapter for my car when the car is pulling the trailer. This worked very well.



by:

This module is a great way to add a 3rd brake light to a trailer.

Pittsgrove E.

1/3/2024

Still working fine.



by:

Just what I needed. Delivered a day early too. Ford couldn't tell me when they would have the part to make my Ford installed shell have a third brake light. Thanks, etrailer.



by:

This module is doing the job!

The
story:

A good looking all windows included long bed Ranger camper shell topper came along, it had the interior and brake lights but the wires were cut back.

There are non-working or completely absent 3rd brake lights on toppers all around here on vehicles. However, you just never know, and now my Ranger's cab's 3rd brake light would be covered with the topper on it.

I didn't want to start cutting wires on my old, old, but relatively nice Ranger in case I made the wrong cut. So I through about using the 4-flat trailer harness as I had that free (and I had an old harness piece from an old boat wiring kit). But the turn signal would cause it to blink.

I tried countless combinations of the wiring running off the 4-flat trailer connector. I had really odd things happening during the trial and error process, such as the blown fuse (first time ever for me) to the warning chime in the cab telling when the lights or keys were in the ignition going off when I applied the brakes.

So I thought I would try this logic module out.

At first I over thought it and had tried a couple combinations out with some old boat trailer lights that might have been cool on the topper.

But then simple and straightforward ended up being the way to go.

The green wire on the logic module to the brake light. The yellow wire to either turn signal connecting wire. A separate spare piece of wire from the brake light to the trailer harness ground. That's it.

The topper is not on the truck as of this review, I hope to get it painted since the green topper clashes with the red truck. When I get it on, I can easily plug the -4-flat harness into the trailer harness. It's rare for me to use the trailer.

I can easily revisit the wiring in the future, using the 12-volt power supply from the harness hook up I could power topper interior lights on switch or add lights to the topper. I could very well splice on the trailer wiring harness as well under the truck if I need the trailer harness for the trailer without cutting into my Ranger's wiring.

Either way, this module made getting that third brake light to not blink and illuminate when the brakes are applied. That's what I wanted.



by:

Used this module to add a 3rd brake light on the back of a tilt trailer. It works great! Easy to hook up.



by:

Flashes third brake light with turn signals until the brake is pressed then it goes solid. Does not work as described

Etrailer Expert

Jenny N.

7/20/2023

It is disappointing to hear that it is not working for you. I do have a few suggestions for you. The first is just to double check that it is wired correctly. The two yellow wires coming from the module should be spliced into the stop and turn circuit wires on your trucks trailer connector - whether it is a 4-Way or 7-Way-. This will then stop those circuits from reaching the 3rd brake light when the green wire from the module is wired into the light assembly. You also want to make sure that the combined amp draw is less than 1.5 amp. If this is exactly how you have it wired, please let me know and I will be happy to look into this further



by:

This item did not work on my vehicle, I was disappointed, but on your website it said it may not work on all vehicles. My 2019 Ram 1500 was one of the vehicles that it didn't work on. I did get my third brake light working, but it was with a $90 Mopar part.



by:

The product works fine. I am not sure why so many people write reviews, claiming that the module does not function properly. (not only on the etrailer site) It is an electronic circuit, deploying a 'logic' to detect whether a turn-signal is applied as opposed to a brake. Evidently it is important to connect the module exactly as the instructions say, to make sure the trailer lights are all properly grounded, and that the current draw through the module does not exceed specs.
One suggestion for etrailer might be to demonstrate how the logic module works in your product video, perhaps by using some sort of bread-board wiring.



by:

Was what I needed. Fast friendly customer service ! Now my topper brake light doesn’t blink with the blinker!



by:

Easy hookup for truck cap’s third brake light. I piggybacked the L turn mini fuse and the R turn mini fuse and connected the module there at the fuse block under the hood—it rests under the cover. One pair back for power and ground to the light. I didn’t tap into the trailer plug so as to prevent future water/salt/corrosion issues.Nice product.



by:

Sorry I wish it can be a good review but there is no diagram and having trouble. The led light set that I installed was awesome, but still can't get the light to work as a brake light, right side sign still makes it blink

Etrailer Expert

Katrina B.

3/3/2023

I have sent you the instructions that we have. Please make sure that you have it installed correctly. If you are still having trouble, please let me know and we can further assist you.



by:

Very easy and straightforward. Had it installed within 15 minutes.



by:

Quick and simple installation - works like a charm. I used it to add a third brake light behind the spare tire of my classic Bronco. Some folks said it may not work with LED brake lights, but that's what I have on my Bronco and it worked just fine.



by:

I was skeptical of this module before purchasing because I didn't know about it. Have used other brands to perform these 3rd brake wiring functions previously. Soldered it between 4-pin connector and rear tail/brake light. Simple install and works great.



by:

Does not work. Wired per diagram instructions. Grounding is correct as this appears to be the stock explanation when device doesn’t perform as described. Do not buy. Not as advertised. A.r.e topper third brake light still flashes when turn signal is activated.

Etrailer Expert

Jenny N.

2/11/2023

We have come across this before. When installing the Pacer Performance 3rd Brake Light Module # PP20-702 you will need to connect the yellow wires to both the right and left turn signal and then the green wire will wire into your 3rd brake light on your truck topper.



by:

Hooked up the module just like the drawing under the bed at my 7-pin wiring harness and when I hit the brakes , it worked and both turn signals work. When I let off the brakes , and turn the turn signals on the 3rd brake light flashes. Sounds like the module is bad.

Etrailer Expert

Jenny N.

11/21/2022

The Pacer Performance 3rd Brake Light Logic Module # PP20-702 should indeed filter out those turn signals so that the 3rd brake light on your topper does not flash when they are on. If you have the module installed and the 3rd brake light is still flashing with the turn signals you will need to make sure everything is wired correctly. The two yellow wires coming from the module should be spliced into the stop and turn circuit wires on your trucks trailer connector - whether it is a 4-Way or 7-Way-. This will then stop those circuits from reaching the 3rd brake light when the green wire from the module is wired into the light assembly. If this is exactly how you have it wired please let me know and I will be happy to look into this further.



by:

The third brakelight module was easy to install, and works great, to isolate the high brake light on our Leer camper shell. The third light comes on with the service brake lights and 4-way flashers, but is properly isolated from the turn signals. It is a win-win.

L. F.

10/12/2022

Very dependable after over a year. I must have followed installation instructions pretty closely.



by:

Module didn't filter out the turn signals as advertised. The 3rd light lite anytime the turn signal was activated and or the brakes. Not supposed to happen. Only when both brake lights lite. Had to call back in to get another one shipped out.



by:

The product is easy to wire for a 3rd brake light Leer truck cap on 2022 Chevrolet Colorado



by:

Worked perfectly with a little jiggery pokery. Required led bulbs polarized the right direction to work, but we figured it out. Did not work with incandescent bulbs.



by:

I'm a retired truck driver. I get a little fanatical about lights. I wanted a third brake light for my trailer. This piece makes it possible. Works out great.



by:

Haven't installed it yet should work fine quick turn a round.



by:

I installed it about thirty minutes after receiving it. Very easy, straight forward installation. Performed as advertised.



by:

Good stuff


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See what our Experts say about this Pacer Performance Accessories and Parts

  • Could Both Wires of 3rd Brake Light Logic Module Be Ran to Single Turn Signal Circuit
    The part # PP20-702 has to connect to both the left and right hand turn signal/stoplight circuits in order to separate out the stoplight. The reason that is because it waits to see voltage on both circuits at same time to then allow the stoplight circuit of it to activate. If you were to run both wires to the left blinker circuit it would basically just blink with the left blinker since it would think both blinkers are on.
    view full answer...
  • Third Brake Light Still Flashes With Pacer Logic Module Installed
    If the third brake light is still flashing with the Pacer Performance 3rd Brake Light Logic Module part # PP20-702 installed then the unit is either installed incorrectly or faulty. I have attached a wiring diagram you will need to look over and make sure you have yours wired correctly. If all of the wiring appears to be correct then you will need to just replace the unit.
    view full answer...
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  • Pacer Performance 3rd Brake Light Logic Module Wiring
    Whenever wiring Pacer Performance 3rd Brake Light Logic Module # # PP20-702 the yellow wires must go to each brake/turn signal and the green wire goes to the 3rd brake light. The reason why you need to hook both up is because the logic module filters out the turn signals and applies only the brake, so wiring only one may cause it to not work properly.
    view full answer...
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  • Adding 3rd Brake Light Wiring for Camper Shell on a 2019 Chevy Silverado 2500HD
    To isolate the brake light signal on your 2019 Chevy Silverado 2500HD you just need the Pacer Performance 3rd Brake Light Logic Module # PP20-702. You can use the attached installation instructions for the 3rd brake light on your camper shell.
    view full answer...
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  • Will Pacer Performance 3rd Brake Light Logic Module # PP20-702 Fit 2019 Chevy Silverado
    The Pacer Performance 3rd Brake Light Logic Module # PP20-702 referenced in your question is a universal item that can simply be used to filter out the turn signal inputs for installation of a 3rd brake light (so the light doesn't illuminate with the turn signals). This is not custom fit for any certain model truck and is a hardwire application so it should work just fine with your 2019 Silverado. The 2 yellow wires from the module will connect to the turn signal wires on the truck and...
    view full answer...
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  • Adding Third Brake Light for Truck Camper Shell on 2000 Chevy Truck
    We have what you need in order to wire in your third brake brake light for the truck camper, though there isn't going to be anything specific to either your 2000 Chevy C2500 or your camper shell. You will simply need to add the Pacer Performance 3rd Brake Light Logic Module # PP20-702 and tap into the turn signal circuits of your Chevy. This converter will separate your truck's combined turn signal/brake lights, which you will need to do so your camper shell's brake light will blink along...
    view full answer...
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  • Is 3rd Brake Light Module Needed for 2014 GMC Sierra 1500 or is CHMSL in Trailer Wiring
    In the wiring harness that runs to your 2014 GMC Sierra 1500 there should be a CHMSL circuit wire in the bundle that you can use for the third brake light of your camper shell. If you can't find it though the # PP20-702 would give you a way to get just this circuit.
    view full answer...
  • Where Exactly to Install Pacer Performance PP20-702 3rd Brake Light Logic Module
    The module is weather proof according to the manufacturer but I'd recommend installing it so that it's as well protected as possible. Inside the camper shell would be ideal as the 3rd brake lamp wiring is easy to access there.
    view full answer...
  • Can Trailer Wiring be Used to Power Camper Shell Dome Light/3rd Brake Light
    The 1:00 pin circuit of the 7-way could be ran to power the dome light since that's a 12 volt circuit that is hot all the time but you would need to go a different route for the third brake light. For that you would need the tail light converter part # PP20-702 which you'd wire to the stop/turn circuits of the 7-way which would then give you a stoplight circuit on the red wire like you need.
    view full answer...
  • Troubleshooting Pacer 3rd Brake Light Module Installation on 7-way Trailer Plug
    In most cases when this occurs, it's down to the wiring being connected to the wrong spots on the 7 way trailer plug. You'll want to be sure you're using the 3 o'clock and 9 o'clock pins when looking at the back of the plug. I've attached a wiring diagram that shows this in better detail that I would ask you to confirm is how you have this wired. If this is exactly how you have it wired please let me know and I will be happy to look into this further.
    view full answer...
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  • Third Brake Light Still Flashing After Installing the Pacer 3rd Brake Light Module
    To me it sounds like you just have a defective unit and just need to replace it. The purpose of the module # PP20-702 is to filter out the turn signal and illuminate the 3rd brake light only. So, if it is not doing that and you've confirmed you wired everything correctly, you'll just want to replace it. I have attached a wiring diagram for you to check out to verify that you've wired everything correctly.
    view full answer...
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  • Fix For CHMSL On Camper Shell Flashes When Turn Signal Is Activate On A 2022 Chevrolet Colorado
    To fix this issue, you're just going to need to install the: -3rd Brake Light Logic Module # PP20-702. This will separate the third brake light and your turn signal lights to alleviate the flashing. Attached is a product overview video for you to check out as well.
    view full answer...
  • Module for Separating Out Dedicated Stoplight Circuit for Salter with Running Light/Stop Light
    The running light/brake light on your salter should have a wire ran to it for the brake light and one for the running light. You'd want to use the # PP20-702 to isolate out the brake light like you need to run to the stoplight circuit of your salter light and then the current running light circuit you have present would then run to the correct circuit on the light and you'd be set.
    view full answer...
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  • Adapter to Get Third Brake Light Circuit Isolated for 2019 Dodge Ram
    You can use the third brake light module part # PP20-702 to get a dedicated brake signal from either your trailer wiring or the vehicle wiring. Since the stop lights and turn signals on trailer wiring are on the same circuit you can use this adapter to convert the wiring to just a stoplight signal which you can use for powering a third brake light.
    view full answer...
  • Where Does The 4th Wire on a 4-Wire Logic Module Connect To a Ground?
    A ground connection is a ground connection as long as it grounds to the negative terminal on your 2016 Chevrolet Silverado it should not matter where it connects. I would still reach out to the manufacturer for your specific logic module as ours # PP20-702 does not require a ground wire. The ground wire for your topper light will still need to ground to the chassis so they all end up with the same connection to the light or the chassis.
    view full answer...
  • Will 3rd Brake Light Blink with Turn Signal with the Pacer Performance 3rd Brake Light Logic Module
    The Pacer Performance 3rd Brake Light Logic Module # PP20-702 filters out the turn signal and only illuminates the 3rd brake light when the brake pedal is pressed. I have attached a photo of the installation instructions for you to check out.
    view full answer...
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  • Pacer Performance 3rd Brake Light Logic Module Not Filtering Out Turn Signals
    The Pacer Performance 3rd Brake Light Logic Module # PP20-702 should indeed filter out those turn signals so that the 3rd brake light on your topper doesn't flash when they are on. If you have the module installed and the 3rd brake light is still flashing with the turn signals you will need to make sure everything is wired correctly. The two yellow wires coming from the module should be spliced into the stop/turn circuit wires on your truck's trailer connector (whether it's a 4-Way or...
    view full answer...
  • Can 2 LED Lights be Powered Using Pacer Performance 3rd Brake Light Logic Module # PP20-702
    There is nothing that says you can't use 2 LED lights with the Pacer Performance 3rd Brake Light Logic Module # PP20-702. And since LED lights draw such little power it is very unlikely that 2 LED lights would overdraw this module which is rated at 1.5 amps. I would not use an incandescent light with it though since they very well could draw more power than the module can handle. But 2 LED lights should not be an issue at all.
    view full answer...
  • How to Wire Third Brake Light on Camper Shell
    Yes we do have a logic module that will work to wire your third brake light on your camper shell, part # PP20-702 the Pacer Performance 3rd Brake Light Logic Module. The third brake light needs to have a brake signal only, and if you are tapping into your trailer wiring, or tail lights wiring the turn and brake signals will be combined. The logic module filters out the unwanted turn signal inputs. This prevents the third brake light from flashing when you apply your turn signal. The...
    view full answer...
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  • Installation of Pacer Performance 3rd Brake Light Logic Module on Truck Topper
    When installing the Pacer Performance 3rd Brake Light Module # PP20-702 you will need to connect the yellow wires to both the right and left turn signal (one signal to each wire), and then the green wire will wire into your 3rd brake light on your truck topper. This module can be used on either LED or incandescent bulbs.
    view full answer...
  • Dim Light When Using 3rd Brake Light Logic Module
    The 3rd Brake Light Logic Module part # PP20-702 works with both LED and incandescent lights so long as the total amp draw of the light does not exceed 1.5 amps. It also works best with single filament bulbs when using incandescent. If the lights works fine with 12 volt power applied but not when hooked up to the module then it likely falls outside of these parameters and would need to be replaced with a compatible option. If you can let me know the size of your existing light, I would...
    view full answer...
  • Wiring A 3rd Brake Light For An ARE Camper Sheller For A 2002 Chevrolet Silverado 2500HD
    You are correct, some GM trucks had a blunt cut wiring harness already installed in the truck for a camper shell wiring. That is the light blue wire tucked up above the spare tire like you mentioned. That light blue wire is the wire that feeds the 3rd brake light on the back of the cab. You may want to confirm first by cutting it, and stepping on the brake pedal, if the 3rd brake light does not turn on, then it's the right one. You also, might have to run an independent ground, it will...
    view full answer...
  • Wiring Camper Shell 3rd LED Brake Light to 2019 Chevy Truck
    To wire in the 3rd brake light from the camper shell to your 2019 Chevy truck I recommend using the Pacer 3rd Brake Light Module # PP20-702. This is designed specifically for single LEDs and will filter out the turn signal input so that it doesn't flash with them during travel. You will simply splice the 3 wires coming from the module to your truck's turn signal circuits and 3rd brake light circuit wire. I have attached an image to assist.
    view full answer...
    Image 1 for
  • Brake Light Logic Module for Use With 3rd LED Brake Light
    The logic box that you are asking about is our Pacer Performance 3rd Brake Light Logic Module # PP20-702. This is a piece of equipment that is required when using an LED light as a 3rd brake light. If there is a specific light style that you are looking for just let me know and I can make some recommendations for you.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Written by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M

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