LCD Digital Circuit Tester

LCD Digital Circuit Tester

Item # PTW2992

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Performance Tool Circuit Tester Wiring - PTW2992
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Lowest Prices for the best wiring from Performance Tool. LCD Digital Circuit Tester part number PTW2992 can be ordered online at or call 800-298-8924 for expert service.
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  • Reviews (10)
  • Q & A (362)
  • Videos (1)
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Performance Tool Wiring - PTW2992

  • Tools for Wiring
  • Testers
  • Circuit Tester
  • Performance Tool


  • Economy LCD Circuit Tester with LED back light
  • Ideally used to detect power, voltage, ground, and circuit integrity
  • Surge protected circuitry displays DC voltage from 3V to 48V (±0.3V accuracy)
  • Conduct circuit tests with increased accuracy and ease
  • LED indicates RED for power or GREEN for ground

W2992 Performance Tool LCD Digital Circuit Tester

W2992 LCD Digital Circuit Tester

PTW2992 Installation InstructionsInstallation Details PTW2992 Installation instructions

California residents: click here

Video of LCD Digital Circuit Tester

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

Video Transcript for Performance Tool Wiring - Tools for Wiring - PTW2992 Review

Today we're going to be taking a look at the Performance Tool LCD Digital Circuit Tester. This circuit tester features an LED back light. It's going to be ideally used to detect power, voltage, ground, and circuit integrity. Serge protected circuitry is going to display DC voltage from 3 volts to 48 volts, with a plus or minus 0.3 volt accuracy. This is going to allow you to conduct circuit tests with increased accuracy and ease. It's got the LED light in there that's going to indicate red for power, or green for ground.

The shank length measuring just that probe right there, that's going to be about 3-3/8 of an inch long. The spring clip which is this portion right here, it's got a nice, protected boot over it. That's going to be a copper construction for great contact. Then it's going to have a coiled cord with a cord saver on there. When fully stretched out, that's going to measure around 12 feet long. When you're ready to use it to test for circuit ground, just connect the spring clip to a good power supply.

I'm actually going to do that, just to show you how the unit works and how it looks. We want to get that connected to a good power supply, and then we'll test our ground wire. You can see that that LED is going to display green, and it's going to display the voltage, so all you got to do is touch the pointed probe to the circuit terminal's wires or chassey to locate the ground. Then the green LED will illuminate, and the LCD will display the measured voltage. Really nice design of the unit.

That does display as a negative number for good ground. Then when you're ready to test for circuit power, just connect the spring clip to a good ground connection. We'll do that, as well, just to show you. Then you can touch the probe to a circuit terminal or wire. Then the LED is going to illuminate red, and the LCD will display the measured voltage if the terminal has power. That's going to do it for today's look at the performance tool LCD Digital Circuit Tester..

Customer Reviews

LCD Digital Circuit Tester - PTW2992

Average Customer Rating:  4.6 out of 5 stars   (10 Customer Reviews)

- PTW2992

This is an awesome product at a great price. Elsewhere online it was $100 so it was a large savings You can check ground just like a regular trouble light but it light up green and you know how strong your ground is.Then you can check power supply then it lights red for power and lets you know the volts. I have tested my remote battery to find out it was weak it was below 3 new one tested 3.1 .I work in the auto field so it will be used to check batteries, charging systems, light sockets,window switches, ect. I love this tester I wont have to break out my ohm meter near as much.The tester appears to be very well built time will tell.For around $20 everyone should own one. 475553

- PTW2992

great item, fast delivery, just what I ordered. Thank You 714041

- PTW2992

Used it twice it fried would not recommend. I bought the tester for general trailer repair for testing lighting circuits and all around diagnostics the one time that it did work it was nice to see the voltages but I just went back to my regular test light. Nothing like having a tool in your box that is garbage and not dependable. Buyer beware. 620503

- PTW2992

Great product work well 558314

- PTW2992

These guys make that online big box store look like a minor league player. The shipping was fast, the product is great and works well. I will be ordering two more this week as everyone who borrowed mine loved the product. I already sold one to co-workers diagnosing electrical problems. The 48 volt capability makes this one tool capable of diagnosing weak batteries in parrallel and series wiring, measuring solar panel output, and diagnosing voltage draw a breeze. 540147

- PTW2992

Works great 480663

- PTW2992

I received the item way earlier then expected and it works exactly as said and exactly as I need it to. Very high quality great for quick electronic diagnosis. 475514

- PTW2992

good product at affordable price, 441322

- PTW2992

Great product and excellent service 427065

- PTW2992

Excellent product. Just what is needed for all the new electronics systems. Computer safe, test circuits without fear of damaging equipment. The addition of the digital voltage readout is a big plus when testing and trouble shooting. Bought two, will order a third for the boat emergency tool kit. Invaluable tool for those pesky electrical gremlins. 367777


Ask the Experts about this Performance Tool Wiring

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  • Dual-recliner theatre seating like the Thomas Payne Seismic Dual Power Reclining RV Loveseat # 195-099-101-098 has separate 12V power wiring for each of the two seat sections. If you have a circuit tester like # PTW2992 you can test the wiring that supplies the chair to see if power is reaching it. You can also bring a charged 12V battery (or another 12V power source) into the trailer so you can directly apply 12V input power to the chair's wiring to see if that activates the chair's...
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  • EOH Trailer Brakes Do Not Activate Immediately When Brake is Applied in 2016 Ram 3500
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  • Your description of your trailer setup indicates that your surge coupler has an electric lockout feature to allow you to reverse the trailer without the surge brakes engaging. Some surge couplers use a manual lockout but yours has a solenoid with two wires (ground and hot) that take in the truck's reverse light signal; this closes the solenoid so no hydraulic brake fluid pressure can reach your brakes when you back up. Somewhere in your wiring you are losing your connection to the Silverado's...
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  • Installing a Brake Controller on a 2016 Honda Odyssey
  • The parts needed and steps taken to install a brake controller, like the Tekonsha Prodigy P3 # 90195, on your 2016 Honda Odyssey will really depend on what they are wiring for your 7-Way. If they have wired all of the functions then you will simply need to connect the 4 wires from the pigtail on the P3 to the following functions: White - Ground (negative terminal on battery) Red - COLD side of Stop Light Switch (wire that gets hot only when brake pedal is pressed) Black - 12V Power...
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  • Can the Custer Trailer Connector Adapter # F77R be Used to Tow a 5th Wheel with a Kenworth Truck
  • The Custer Trailer Connector Adapter # F77R is meant to go from a trailer with a 7-Pole Round connector to a 7-Way Blade connector. I believe that you need the exact opposite which can be found with the Pollak # PK12-724. You will need to take note to see if your 7-Way on your Kenworth has separate taillight wiring or not. If you test the pins on your 7-Way Round with a circuit tester # PTW2992 and find that the stop light signal has its own pin then you will need to splice in a converter...
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  • How to Find COLD Side of Brake Light Switch for Hardwiring Brake Controller
  • When you are hardwiring a trailer brake controller like the Prodigy P2 # 90885 the red wire connection that provides the triggering signal to the controller should be made to the wire on the COLD SIDE of the brake light switch circuit. This is the wire that carries 12V power ONLY when you press the brake pedal and at no other time. Please refer to the linked photo and article for more details. If you were to connect the Prodigy to the HOT side wire then the controller would constantly...
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  • Wiring and Brake Controller Installation on a 2016 Chevy Express Van
  • You are definitely on the right track with parts # 118392, # ETBC7, # 39510, and # 20127 in your cart. I really only have one extra part that I believe you will need to add - part # ETBCXW which is extra wire for the # ETBC7. It gives you 10 extra feet of the wiring that you will need for the brake controller and 12V power for your 7-Way. Although the Prodigy P2 # 90885 is a great brake controller, the Voyager, part # 39510 is not a bad controller itself. The main great thing about it...
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  • You can use the Roadmaster Nighthawk All Terrain Tow Bar # RM-676 on your motorhome that has a 6-pole wiring connector by using an adapter # 337TC1067P. You will just want to confirm the function/pin configuration on the motorhome socket to verify that the center pin carries the 12V auxiliary power circuit. If you apply a circuit tester like # PTW2992 to this center pin and detect continuous 12V then the adapter will work fine. If you have a small 12V light bulb or a volt meter those can...
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  • Installing Roadmaster 9700 Portable Braking System on 2014 Chevy Equinox
  • Thank you for your recent purchases! The Roadmaster 9700 Portable Braking System # RM-9700 that you referenced will work great on your 2014 Chevy Equinox. With this system on your vehicle you will need to add the Stop Light Switch Kit # RM-751439, which allows the RV monitoring system on the Roadmaster 9700 work properly, and the 12V Outlet Kit # RM-9332 to provide power to the unit. I have attached a couple installation videos for each of these parts on your Chevy Equinox that you can...
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  • Troubleshooting Install of Prodigy P3 Brake Controller 90195 in 2017 Ford F-450 Cab & Chassis
  • Wiring adapter # 22292 is the correct one for installing a Tekonsha brake controller such as the Prodigy P3 # 90195 in your Ford F-450 cab and chassis. There are two possibilities you can check to troubleshoot this issue. First, use a circuit tester like # PTW2992 to confirm that the connector under your dash has one pin with constant 12V power and one with 12V power ONLY when the brake is pressed. The other two pins should not carry any voltage. If your vehicle connector displays different...
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  • Troubleshooting Gooseneck Trailer Wiring Connection with Tow Vehicle
  • It sounds like you have tested your truck with other trailers and your trailer with other trucks and have found the wiring circuits to connect and function correctly. This tends to suggest that there is just an issue between the two specific connectors. 7-way sockets and plugs like # PK11893 that you referenced and # A10-7W6 will vary slightly in their fit with one another so in some cases one or more circuits in the 7-way, such as the trailer brake circuit for example, may not make good...
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  • How To Add 7 Way Connector to 2013 Lazy Daze Ford E450 with 4 Pole Round Connector
  • To start, I don't think the Hopkins # HM40975 is going to accomplish what you're wanting to do without adding some extra parts since it's really just a socket without any wiring; I would instead recommend that you use the # ETBC7L since it comes with all of the wiring, relays, butt connectors, 4 way and 7 way connector, and will allow you to retain use of your 4 way round plug in the future. The main catch is that you'll want to use the Adapter 4 Round to 4 Flat # 47465 to plug into the...
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  • Redarc Tow Pro Elite Brake Controller Installation in 2018 Toyota Highlander XLT with Tow Package
  • Tekonsha, one of our brake controller resources, has told us that a diode like # RM-690 is needed on the 2018 Higlander brake light circuit to prevent the controller from backfeeding onto the vehicle wiring. The side labelled "in" goes to the vehicle wire. Connection of your Redarc, like any other trailer brake controller, will be as follows: Controller RED to COLD side of brake light switch (via the diode). Use a tester like # PTW2992 to help you find the wire that goes hot only...
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  • We have the dimensions on the main unit and control knob for the Redarc Tow-Pro Elite # 331-EBRH-ACCV2, but unfortunately we have not had the opportunity yet to install one of these on a 2016 Hyundai Santa Fe Sport 2.0 FWD so I don't have a way to confirm if it would fit on my end. The main unit measures 3-3/8" long x 3-15/16" wide x 1-1/8" tall and the control knob measures 2-3/8" long x 3/4" wide x 7/8" tall. I have linked some photos with these dimensions marked so you can take some...
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  • Brake Controller Not Getting Power on a 2010 Ford E350 Van
  • The first place that I recommend checking when you lose power to something would be your fuse box. A blown fuse can cause the power to not reach your brake controller. If your fuses look okay then it might be easier to find a wire that is connected to your battery and trace it back to your brake controller. If you can find the right wire this way, then you can check for any signs of corrosion, exposed, or damaged wiring. As for the connector in the picture that you sent, there are no...
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  • Does Curt Echo Brake Controller C51180 Install Without Hardwired Connection
  • As long as your Jeep's 7-way has an active 12V power circuit you can install the Curt Echo Trailer Brake Controller # C51180 without having to do any wiring at all. The presence or absence of the blue brake circuit wire makes no difference to the Echo. If you refer to the linked photo of a 7-way you'll see the 12V circuit contact at the 1:00 position. You can check for power there using a circuit tester like # PTW2992. The Echo simply plugs into the Grand Cherokee's 7-way. It will...
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  • Curt Adapter # C57674 and Tekonsha Prodigy P2 and P3 Operation
  • If you have the Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps # C57674 correctly installed then the 12V light will remain on as that is 12V of constant current going to the adapter. The way that the Tekonsha Prodigy P2 # 90885 and P3 # 90195 brake controllers work is that they have to have a trailer connected and there has to be movement for the inertia sensor to actually send output to the brake controller pin on your 7-Way when the brake pedal is pressed. The way to test one of...
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  • Troubleshooting 2016 Nissan Frontier Trailer Wiring with No Turn Signals
  • Thank you for describing the trailer lighting issue you're having and the testing/troubleshooting steps you've taken to diagnose the cause. If I understand correctly you have a 4-pole harness such as # HM43575 which does indeed plug in to the OEM tow package wiring under the vehicle. For reference I linked a photo of this item's OEM plug which should match what is on the Frontier. Since you have tested the contacts on the vehicle plug where this item connects (with a tester like # PTW2992)...
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  • Troubleshooting Reverse Light Function Not Working for New LED Lights on 1990 Jeep YJ
  • Since I don't know what LED lights you purchased for your 1990 Jeep YJ but I'm pretty sure the 4th wire is for your reverse lights and that you have your ground connected to your reverse light function. For example, the Jeep-Style LED Combination Trailer Tail Light # STL60RLBP for driver side and # STL60RB for passenger side, have 4 wires which connect to the following functions: White wire for ground Black wire for tail light and license plate light Red wire for stop/turn signal Yellow...
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  • Troubleshooting Installation of Tekonsha 7-Way Wiring Harness 118286 in 2018 Honda Pilot
  • To begin troubleshooting your Pilot you will want to reset the electrical system. Since it has the keyless ignition you can reset the vehicle by disconnecting the battery negative terminal and waiting a few minutes. Then re-attach the cable. Do this before you conduct the signal testing. Since you installed all fuses (both in the engine compartment and in the receptacle on the harness near the converter box) and all of your connectors are fully seated together what I suggest is testing...
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  • Wiring Third Brake Light for Truck Camper Shell
  • The first thing you want to do is check above the spare tire on your 2014 GMC Sierra 1500 for a wire loom and there may be a light blue wire that is the lead for your third brake light; you do need to verify this with the use of a circuit tester such as # PTW2992. If that is not there 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 Sierra. This converter will separate your truck's combined turn signal/brake...
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  • Troubleshooting 7-Way to 6-Pole Wiring Adapter Operation
  • It sounds like you are using a 7-to-6-way coiled adapter cable like # RM-1676-7 between your Class C Jayco Melbourne's 7-way and the 6-pole on your towed vehicle. Some trailer wiring testers that use LEDs may not always work correctly. If you have a probe tester like # PTW2992 I suggest you re-test the 7-way contacts one at a time. You can refer to the linked photo to see which pin to test for each function. The photo shows the usual RV circuit configuration but there are multiple ways...
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  • How to Properly Install Wiring for a 6-Way on a Trailer
  • To accurately determine what wire is for what function on your trailer side 6-Way, like part # 50-61-104, you will need to use a 12V power source and test each wire to see what it does. You can use the battery off of your tow vehicle and simple ground the negative terminal to your trailer and then connect the positive terminal to each wire one at a time. You will then want to make sure that your trailer is wired in a way that matches the functions on your tow vehicle. You can test those...
    view full answer...

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Info for this part was:

Expert Research:
Jameson C
Installed by:
Cole B
Written by:
Mary E
Updated by:
Erin H

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