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Digital Multimeter with 42" Long Test Leads - LED Display

Digital Multimeter with 42" Long Test Leads - LED Display

Item # PT89ZR
Our Price: $19.99
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Performance Tool Electrical Tools - PT89ZR

  • Testers
  • Multimeter
  • Performance Tool
  • Yellow

  • Safely troubleshoot a variety of automotive, household, and shop electrical circuits
  • Test electrical components for faulty wiring and voltage
  • Verify voltage on engine sensors, ignition, fuel systems, and charging systems
  • Large digital LED display with UL-listed leads and probes
  • Test leads are 42" long

W2969 Performance Tool Digital Automotive Multimeter

Installation Details PT89ZR Installation instructions

Video of Digital Multimeter with 42" Long Test Leads - LED Display

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

Video Transcript for Review of Performance Tool Tools for Wiring - Digital Multimeter - PT89ZR

Ellen: Hey, everybody. I'm Ellen here at, and we're going to take a quick look at the Performance Tools digital multimeter. This is something that's really handy to have any time you're doing any kind of electrical job, or you're trying to test out any wiring, maybe do some troubleshooting with some wiring that's gone bad, you want to test out your battery, really anything along those lines. So a lot of times these are just something that's handy to have in your toolbox for any of those sort of instances.inaudible 00:00:25 about this is that it does give you a pretty big digital display that makes it easy to see what's going on. You get the leads that are about 42 inches long, so should be plenty of space, or plenty of length to get connected to whatever you want. And then there's also the included attachments that have a little alligator clamp, so that makes it easy, especially for testing out a battery without having to hold the little prongs over it the whole time.

So let's take a closer look and kind of run through some of those basic tests that you might end up doing.So here's our little guy, we've got a little kickstand at the back, makes it easy to just set this on a surface, set it on your trailer, on the floor, and we'll still be able to see what's going on. I'm going to hook up my leads here, they are color-coded so it makes it easy to remember what goes where. Got a couple little ends going over the prongs here. You'd probably end up losing these, honestly, but they do kind of help protect these. They are a little bit sharp, so if you've got these in a toolbox, it's kind of nice to have the caps just to keep them from ending up in your hand.There's also a couple of caps going over these ends, which I doubt you'll ever use, unless you're pretty meticulous about taking things apart and putting them away.

I'm just going to connect this up here. Most folks like to just keep the leads attached, makes it a little easier, so you're not having to take things apart every time. I'm going to put my alligator clamps over so we can test out our battery first. You don't have to, of course, you can just put the prongs over and it's not really too hard. You just want to make sure if you are going to use these, the inside there, this might be kind of hard to see, there's a little sleeve that that prong needs to fit into.

So just want to line that up to make sure it makes good contact all the way around.To turn this on, you just need to turn the dial away from the off position. So I'm going to turn it around to the 12 volt DC portion so I can test out my battery here. Swing those guys over and then set up my little kickstand there, and then just want to match the leads to my battery. We got red going to positive, black going a negative. And you can see our display showing what's going on there, so about 12 volts, that's what we should expect to get out of this.

Now there is a hold button, it's going to be that yellow one kind of on the left-hand side, to freeze the display at whatever it's reading out. Sometimes on other multimeters, if you press that, it'll freeze it at whatever the highest rating is. But this, it's just going to freeze it at whatever it is at the time on the screen, so that's something to keep in mind.To reset it, just press it again. I've run into this, though. I'm not a huge fan of the way this functions on these multimeters, because if you don't have it connected, maybe you don't realize that you have the hold button pressed, so if you try to go and use it, it's still at zero, and it could be a little confusing. It might make you think that there's something wrong with the multimeter, but it's just that that hold is on. So as soon as we press it again, it's going to give us our true reading, but that's just something to keep in mind there.There is another multimeter available from Performance Tools that has a little bit bigger screen, and that at least does have a little indicator to let you know when the hold is on, which I kind of like, just so that you can, if something's going on and you don't realize the hold is active, it gives you a visual cue. But again, if something's going on wrong or you're just not getting a readout, or it's not changing, press that hold button and see what happens, and that should make it pretty easy.Another common way to use this is to test out wiring functions, so if you we're to plug this in and then you want to test what each port is to make sure you get things wired up, this would be another way to do that. So you'd have current going through, and then I think usually this guy is the ground, and then you'd want to run through all the functions and test out what goes where, so that's a pretty common way to do it. It does give you pretty long lead, so it makes it easy to fit that into any kind of wiring plug and get connected to make sure that you can test things out, do your troubleshooting and what have you.So all in all, this is a pretty standard multi-meter. As I mentioned, there are other couple available here at I'd say this is kind of the middle of the road one we have. Here's continuity, it does give you an audible alert. So if you want to test a fuse or something like that to make sure that there's continuity, you can use that function. It does come with instructions so that you know what all those functions are and kind of give you the tutorial of how to use it. But all in all, this one is probably the nicest, just because it is still a digital display so that makes it easy to see what's going on. But it's also pretty compact, so if you want something just a little bit smaller than the other ones, this is a pretty good option. And it does still give you those alligator clamp attachments if you want to use those to make it a little bit easier to test out something like a battery.That's pretty much all there is to it for our quick look at this digital multimeter. I hope that this has been helpful in deciding if this is the right one for you. We do have a lot of other wiring, trailer and RV accessories available here at, so be sure to check them out. Thanks for watching.

Customer Reviews

Digital Multimeter with 42" Long Test Leads - LED Display - PT89ZR

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)




See what our Experts say about this Performance Tool Electrical Tools

  • Troubleshooting Taillight Wire Power at 7-Way Trailer Connector
    What pin of your 7-way are you testing? If you are testing the pin at 11 o'clock when facing the connection on your truck, you should have a reading anytime the truck is turned on for running lights unless you have turned off the running lights. All other plugs should be cold except the 12V at 1 o'clock. Use a multi-meter like # PT89ZR to check for the voltage reading so we can further troubleshoot. Is it illuminating the stop lights on the trailer or the running lights?
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  • Troubleshooting Tekonsha Prodigy Brake Controller With Drag At Setting B3
    The button on the right on the Tekonsha Prodigy is the Boost button. The boost levels are pre-set based on how much the trailer weighs in comparison to the tow vehicle. For example, by pressing the button once, it will display what the current boost level is. If you see ".c" that means the boost is off. If you see ".c." (with the second dot) that means it is on. Every press of the button changes the boost level up to b.3. A boost setting of b.1 is for trailers that weigh less than the...
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  • Troubleshooting Trailer Disconnect Message On 2010 F-150XL With Factory Integrated Brake Controller
    Seeing as your brake controller only gets that signal when you hit the manual override on your controller, I suggest adjusting your controller and seeing if the difference in voltage sent causes that error message to not be triggered and yet still function correctly. Next, I would check the brake magnets on your trailer as they may be wearing out and the extra voltage is causing them to short. I've attached an article to help you test them since this is a new occurrence using the same...
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  • Troubleshooting Output Shorted No Brakes Message on Tekonsha P3 Brake Controller
    It does sound like there is a possible short with the brake magnets on your trailer, especially if all the wiring looks good between the brake controller and vehicle connector. I recommend first making sure that each magnet has one wire secured to the trailer frame for ground and the other is connected to the brake output circuit. Check that there are no damaged or exposed areas that might be making contact to the trailer frame. If the wires all check out, then you will want to test the...
    view full answer...
  • Troubleshooting New Trailer Brakes That are Locking Up
    You might want to start out by checking the wiring for your trailer brakes. There could be a short on that circuit (bad ground or damaged wiring) that is causing things to act weird. Most likely you have a bad brake magnet. Take a multimeter, like part # PT89ZR, and test your brake magnet that is acting up with a 12V battery. I have attached a link to a helpful article that goes over how to test a brake magnet for you to follow. If that doesn't fix it let me know and I can help you continue...
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  • Troubleshooting Battery Discharging and Causing Electric Jack Issue
    It is possible that there is a bad ground on your jack and it is definitely worth checking, but it doesn't sound to me like that is the issue. Since it functions fine when plugged into the truck, which uses the same ground. It does sound like there is a draw on your battery and that will absolutely affect the function of the jack, but many times the low battery is caused by something else. I recommend starting by checking the main battery ground and then making sure the trailer battery...
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  • Diagnosing Trailer Brake Problem on 16 Foot Dual Axle Trailer Pulled by 1979 Jamboree Motor Home
    Are you hearing the brake controller humming, or the brake magnets on the trailer? Use a multimeter like part # PT89ZR to test the voltage on the blue wire exiting the rear of the controller while the override switch is activated. If the controller is set for maximum power, you should see close to 12-volts. Then test the brake output pin at the trailer connector. For a 6-way, it will be the pin in the 10:00 position. For a 7-way, it will be the pin in the 5:00 position. Once again, with...
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  • Troubleshooting Electric Brakes Locking Up on Trailer
    Since you seemed to have narrowed the possible cause down to the vehicle side of your setup, I recommend starting with the 7-Way connector at the rear of your tow vehicle. Check for any corrosion or debris build-up inside the connector that might be causing a short and clean as needed. If the connector looks fine, use a multimeter like # PT89ZR to test for voltage at the brake circuit on the connector when you have the brakes applies using a low setting. With this setting, you should...
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  • Troubleshooting Trailer Brake Magnets That Receive Only 9.5 Volts from Trailer Wiring
    You can expect some minor voltage drop between your trailer's junction box and the brake magnet wiring but losing 2.5V suggests you have a short in your brake circuit. I suggest tracing all brake circuit wiring from the j-box to each of the brake assemblies. Look for worn insulation, cracked insulation, points where the wiring may touch the trailer frame or moving suspension parts. Also check that any splices are solid. Also make sure that the magnet wire you're using as ground is solidly...
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  • Troubleshooting Heating Element on Water Heater
    To test your heating element you will need a multimeter like # PT89ZR. You will set your meter to the lowest ohm setting and put one probe on each of the screws on the heating element. You should get something between 10 and 16 ohms. When one is all rusted or corroded you would get no reading to show there is no continuity and it would most likely throw your breaker. Since your water is really cold, you most likely have a failed heating element and will need to replace it.
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  • Troubleshooting 2016 Ram Factory Brake Controller Not Recognizing Restored Trailer
    Since the integrated brake controller on your 2016 Ram 1500 worked fine on a different trailer, the issue definitely appears to be somewhere on your restored 1972 Airstream. I first recommend checking the 7-Way on the trailer to make sure there isn't any built-up dirt or corrosion behind the pins, cleaning out as needed. Then you will just need to check the newly installed wiring to make sure there aren't any pinched or exposed areas that might be causing a short. Also check to make sure...
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  • Troubleshooting A Brake Controller In A 2016 Chevy Silverado 2500 That Keeps Loosing Connection
    This is becoming a pretty common issue with factory brake controllers for newer Chevy/GM trucks but can also happen with an aftermarket brake controller. I would start by testing the brake output wire with a multimeter # PT89ZR and pressing to manual override fully to see if it's actually sending out full power. If not then we know the brake controller is defective. From there you'll need to trace the wiring from the brake controller to the 7-way to see if there's a short anywhere or loose...
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  • How to Test Brake Magnet Amperage With Multimeter
    You are correct, the PT89ZR is only designed to measure up to 10A which will not allow you to measure for 4 or 6 brake magnets on a trailer. In this case I would recommend using a multimeter with a higher amperage rating or testing the magnets separately. At this time we do not carry a multimeter capable of testing more than 10A. The next section of our brake magnet testing article details how to test each magnet separately to determine if one or more of the brake magnets on your trailer...
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  • Should The Trailer Brake Circuit Have Continuity Between the Blue Power Wire and Ground?
    It is normal to have continuity between the brake(blue) wire and ground(white) wire. The electric trailer brake is an electromagnet when it has power it attracts to the steel inside the hub/drum. If you are having issues with your trailer brakes please read the article I linked below as it will run you through the process of testing the magnets.
    view full answer...
  • I Have Voltage At The Truck But No Voltage At The Trailers Running Lights
    Not to worry, this is a common issue and I will be happy to help you get your running lights working again. Since you already checked the fuses and relays on your vehicle. The next step is to inspect the trailer connector for corrosion in the connector, inspect the wiring and where the harness connects to the truck wiring for any shorts. The next step would be to check all of the grounds for a loose connection or corrosion and clean and relocate as necessary. If the above steps do not...
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  • Troubleshooting Malfunctioning Electric Trailer Brakes on a Utility Trailer
    After researching your brake controller, it sounds like you have a ground short on you trailer. The code OL stands for Over Load, which means a shorted or over loaded brake circuit. You will need to check the brake wiring on the trailer. Look for frayed wiring that could be contacting the surface of your trailer. Also, check to make sure all the grounds are properly secured to a clean section of the trailer. If the wiring looks good, then you will need to check the brake magnets on your...
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  • How to Verify 12V Pin on 7-Way Connector is Active
    To verify that the 12V pin on your Sequoia's 7-Way connector is active, you can use a multimeter like # PT89ZR to test the voltage at the 12V pin (1 o'clock position) on the connector while the vehicle is running. You can also check the voltage closer to the trailer battery to make sure it is reaching its destination. If you are looking for something to actually monitor or verify its charge while you are on the road, we do not currently have something that has this capability. As long...
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  • Troubleshooting Trailer Brakes Getting Only 8 Volts Of Power
    If you are only getting the 8 volts when you pull the pin using a meter like # PT89ZR, that has nothing to do with your brake controller as the breakaway battery is powering that from the trailer itself. You can confirm your brake controller is working properly by checking the 5 o'clock pin on your 7 way with your meter when the trailer is disconnected while having someone hit the manual override on your brake controller. You most likely have a bad ground in your wiring on your trailer....
    view full answer...
  • Troubleshooting a Tekonsha Voyager Brake Controller That is not Recognizing Trailer Connection
    There may be a chance that your brake controller has malfunctioned and may need to be replaced. To make sure I have attached an article that will explain how to test the brake controller. To check the output voltage at the rear of the control, cut the Blue wire 5-6 inches behind the control. Install the test light between a known good chassis ground and the Blue wire coming out of the control. Apply manual slide fully; using the volt meter like # PT89ZR, measure the voltage from the Blue...
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  • Troubleshooting Malfunctioning Electric Trailer Jacks That Will Not Operate
    There are a few things that could be causing your electric jacks from malfunctioning. First, on-board power could be the issue. Check the battery and connections to make sure that you are getting full power to operate the jacks. If you have a multimeter, like # PT89ZR, you can test the resting volts of your battery. The battery should read between 11 - 13 volts. If not charge the battery and then retest. Then have someone try to operate the jacks at the same time you are testing the volts....
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  • Electric Brake Magnet Troubleshooting and Testing
    You are correct that the amps and voltage are not the same. If you put your multi-meter like # PT89ZR between a spliced brake output wire on your vehicle between the brake controller and the trailer connector socket with your trailer connected to your vehicle, you should get an amperage reading of 7.5 to 8.2 amps for a single axle trailer, 15.0 to 16.3 amps for a tandem axle trailer, or 22.6 to 24.5 amps on a triple axle trailer. If the amperage reading is less then the specified amounts...
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  • How To Troubleshoot Electric Trailer Brake Magnets
    I have attached a helpful article that explains 4 methods for testing your electric brake magnets. You will need a multimeter like part # PT89ZR to check the amperage when testing the magnets. The article explains how to test the magnets while the trailer is connected to the vehicle and also explains how to do bench testing to see if the magnets are working properly or need to be replaced.
    view full answer...
  • Troubleshooting Brake Controller Trailer Brake Issue When Not Using Manual Slide
    It sounds like it could be a brake controller adjustment issue or the brake controller could be bad. I've attached an article on Brake Controller troubleshooting to assist. I recommend checking the voltage with a meter like # PT89ZR on the blue wire coming out of your brake controller when you hit the brake pedal with your controller turned all the way up. If this reading is not in the 12V range, your brake controller is most likely bad.
    view full answer...
  • Trailer Fuse Blows When Two Series-Wired 6V Batteries are Connected
    A single 12V battery can be replaced with two 6V batteries that are wired in series. This wiring arrangement is shown in the linked image. Two 12V batteries in series produce 24 volts; two 6V batteries in series produce 12 volts. If the batteries are wired in series, the positive terminal of one battery will be connected to the negative terminal of the other. This would double the output of the batteries, so two 6V batteries wired in series would provide 12 volts of output. Current capacity...
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Info for this part was:

Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Matthew S
Written by:
Matthew S
Employee Daron K
Edited by:
Daron K

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