Hook Probe Circuit Tester

Hook Probe Circuit Tester

Item # PTW2993

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Performance Tool Testers Wiring - PTW2993
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Lowest Prices for the best wiring from Performance Tool. Hook Probe Circuit Tester part number PTW2993 can be ordered online at etrailer.com or call 800-298-8924 for expert service.

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Performance Tool Wiring - PTW2993

  • Circuit tester easily identifies shorts in 6V, 12V and 24V circuits, fuses, test connections, and wiring harnesses
  • Wire-piercing molded hook locks onto wires to free your hands while working
  • Extended molded hook allows for testing in confined spaces or with limited access
  • High-intensity light bulb
  • 4' Long cord is insulated and resistant to oil and heat

W2993 Performance Tool Circuit Tester

Replaces Draw-Tite 3808

California residents: click here

Video of Hook Probe 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 - PTW2993 Review

Speaker 1: Today we're taking a look at a hook probe circuit tester. Now, this circuit tester easily identifies shorts in six volt, 12 volt, and 24 volt circuits, fuses, test connections, and wiring harnesses. It's great to have around the house, it's great to have around the shop. It features a wire piercing molded hook that locks onto the wires to free your hands while working. All you have to do is push this up, it's spring loaded, place the wiring inside here. The wiring that you're wanting to test.

Let go, put your fingers on top, push down to pierce it, and that's all there is to it. The extended molded hook allows for testing in confined spaces or with limited access. It does feature a high intensity light bulb, and a four foot long cord, that's insulated and resistant to oil and heat.I'm going to go ahead and show you how to use it. I have a power box here, I'm going to zoom out so you can see exactly everything that I'm doing. I just have a power box that we use, mostly for testing lights and trailer wiring, and stuff.

What I'm going to do is, I'm going to turn that on, so with power running to it, that means that my 12 volt supply, which is my black wire here, has power. To test that, I need to hook this to my ground connection, it's just a big alligator clip. I'm grounded, and then I take this, open it up so that I have area or space to put my wire through, and then I just allow the little point to do its job. Push down, and then because I have power running to it, the light comes on.Now, if I don't have power running to it, it's going to identify that and my lights not going to come on. Again, it allows you to easily and quickly identify issues in your wiring.

It's a nice easy way to identify, and a nice easy to use system. That's going to do it for today's look at the hook probe circuit tester.


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  • Troubleshooting Error on Front Right Jack of Ground Control Leveling System on Trailer
  • With the Error RF on your system, since the unit will not go up or down, I recommend checking the connection wires on that jack. If there is a lack of power to the jack, this error will occur. Test the wires using a circuit tester like # PTW2993. Next, test the jack using a 12V jumper wire and ground while disconnected from the system. This will help you know if the jack is bad, or if there is a connection that is bad. If the front leg is bad, you can use the Replacement Lead Leg for...
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  • Can 6-Way on Towed Vehicle be Hardwired to 7-Way Connector on RV
  • The easiest way to connect your towed vehicle to the 7-Way on your RV will be to use a cord like the Blue Ox 7-Wire to 6-Wire Coiled Electrical Cord # BX88206. This will allow you to quickly connect your tow vehicle to your RV by using the included coiled cable that features a 6-Way on one end and a 7-Way on the other. If you would rather hardwire the 6-way wires from the towed vehicle cord to the 7-Way, you can certainly do this. You will just need to make sure that you make the proper...
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  • How Does 7-Way and Brake Controller Install in 1973 Ford F-350
  • For a truck as old as yours it would be pretty hard to find a wiring diagram for installing the 7-way part # 20023 but I can help you figure it out using a circuit tester like the part # PTW2993. Basically you are going to need to test all of the wires of your taillights to determine their function and then wire to the 7-way using the included diagram. Now hardwiring in a brake controller will be a similar process but you'll only have to test the wires at the brake switch till you find...
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  • Installing Furrion Side Marker Light with Camera on 2019 Momentum 351M
  • The Furrion Side marker lights with camera # FCE48TASL you will have the running light wire (brown) camera power (red) and ground (black). Because it sounds like you have two sets of wires, it is likely one set is running light power and the other is the ground. You can use a circuit tester like # PTW2993 to determine function. Once you have done so, the brown and red wires connect to the running light power and the black will connect to ground. This will give you camera power as long...
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  • Is Dealer Activation Required for Trailer Wiring Harness # C55384 on 2015 Jeep Grand Cherokee
  • When you install the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # C55384, it may be necessary to see a local Jeep dealer to activate the tow package wiring circuit. Some vehicles have the active tow package wiring and others do not, so you will know as soon as it is installed if this is required or not. If you test the function using a tester like # I26, a circuit tester like # PTW2993, or connect it to a trailer, you will be able to...
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  • Troubleshooting Truck Bed Cargo Camera on 2016 Ford F-350 with Factory Screen
  • For your 2016 Ford F-350, the Truck Bed Cargo Camera for 8" Factory Monitor - Switch Kit # 3460006 is the correct fit. I reached out to their tech and he said since you are getting the switch over to a black screen it simply sounds like you aren't getting 12v power to the camera for it to sent the signal back. You will want to use a circuit tester like # PTW2993 to test the black power wire going to that camera and then trace that wire to determine why power is not getting to the camera....
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  • Troubleshooting 7-Way Trailer Connection Wiring on 2017 Nissan Frontier
  • In your 2017 Nissan Frontier, the Curt brake controller should be installed using the custom wiring adapter # C51382. This should work correctly to give you the proper wiring within your cab. Then you will use the Curt # C56226 or the Tekonsha # 118266 to get the correct 7-way. If you have done this even using the previous relays, check your trailer connection for functions using the attached photo and a circuit tester like # PTW2993. It sounds like the trailer may be mis-wired...
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  • Troubleshooting Constant Power on Drivers Side Tail Light of Trailer Connector
  • It sounds like you have a crossed wire after the fuse panel. Sometimes this happens inside the trailer connector, so I recommend removing your trailer connector and using a circuit tester like # PTW2993 to test each of the wire functions at the US Car Connection locations like you see on this harness # 20147. If this connection works correctly then you will want to replace the 7-way connector on your vehicle because it has an internal issue. If this is the case, I recommend the Hopkins...
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  • Installing Tekonsha Prodigy P3 Trailer Brake Controller on 2018 VW Atlas with Tow Package
  • The Tekonsha Prodigy P3 Trailer Brake Controller # 90195 that you referenced is an excellent choice and it will work great with your 2018 VW Atlas. If your VW Atlas is equipped with a fully functional 7-Way connector at the rear of the vehicle, then the controller just needs to be hardwired to the factory harness you found beneath the dash. On the brake controller, the black wire is for 12V power, the blue wire is for brake output to the 7-Way, the red wire is for the cold side of your...
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  • Troubleshooting Lippert Steps With Wall Switch That Doesnt Stop Step Extending or Retracting
  • Since the Lippert Components Kwikee 25 Series Triple Electric Step # LC3658373 won't stay out when you flip the wall switch off, it sounds like you have the manual switch wired incorrectly. When the switch is off there should be no power getting to the magnetic door switch so the steps remain in whatever position you had them in prior to shutting off power to them. You can test the switch using a circuit tester like # PTW2993. You should have power to the switch on one terminal and...
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  • Installation of Brake Controller on 2015 Ford Transit T250 With Factory Tow Package
  • Since you already have the factory tow package in your 2015 Ford Transit T250, I recommend the Tekonsha Voyager # 39510 along with the harness # 20127 to give you your basic controller. This will need to be hardwired as your vehicle doesn't have the dash adapter. I recommend using a circuit tester like # PTW2993 to test wires for function before splicing. If there are no brake controller output wires and 12V power lined under your dash, then to hardwire your controller you will need...
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  • Trailer Wiring Recommendation For 2017 Jeep Grand Cherokee
  • The Pollak 7-Way part # HM40975-11933 is a fit for your 2017 Jeep Grand Cherokee and would plug into a square connector at the rear of the vehicle. Most likely it's the connector you found already based on what you described. You might test the pins of the connector you found with a circuit tester like part # PTW2993. If they are active when vehicle taillight signals are on then this will work. If instead you do not have the tow package wiring complete the T-one kit part # 118727 would...
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  • Brake Controller Recommendation for 2018 Jayco Seneca Motorhome
  • For a brake controller I would recommend the Prodigy P3 Brake Controller part # 90195 for your 2018 Jayco Seneca. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller that senses the amount of braking the tow vehicle is applying and applies a proportionate amount to the trailer brakes. This will be the last brake controller you buy. It can easily be transferred to future vehicles as well. That we are...
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  • Finding Reverse Light Circuit When Installing 4-Way to 5-Way Adapter on Vehicle
  • When connecting to the reverse light circuit of a vehicle for a 5-way adapter like the part # 20036 you want to use a circuit tester like part # PTW2993 to test the wires that run to the reverse light circuit till you find the one that has voltage when the reverse light is on. That's the power circuit to use for the 5th pin of the adapter. I don't have a way to look up what color the wire would be on your truck but using the tester will lead you to the correct circuit.
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  • Installing 7-Way Connector on 2007 Ford Expedition with Factory 4-Way
  • Since your 2007 Ford Expedition has the factory 4-Way connector at the rear of the vehicle, you will just need to install the Hopkins Adapter 4-Pole to 7-Pole # 37185 to complete the wiring and install a fully functional 7-Way. Vehicle manufacturers will often change the wire colors on their factory trailer wiring, as appears to be the case on your Expedition. Because of this, I highly recommend testing the wires on your vehicle with a circuit tester like # PTW2993 in order to determine...
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  • Tailgate Lock Installation on 2018 Toyota Tacoma
  • The Pop & Lock Custom Tailgate Lock # PAL8535 is the correct fit for 2016-2019 Toyota Tacomas as well as 2007-2019 Tundra models. Unfortunately the direction from the manufacturer are for the Tundra as you stated. I reached out to the manufacturer and they can't give me the colors and functions you are seeking. The best way to determine the function of your wires so you can ensure your tailgate lock is connected properly is to use a circuit tester like # PTW2993 to test functions to...
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  • Troubleshooting Trailer Lights Not Working with Curt T-Connector Harness Installed on Ram ProMaster
  • Since all of the trailer lights worked fine when using a different vehicle, it does seem like you have narrowed down the issue to the wiring on your 2018 Ram ProMaster 1500. To further verify this I do still recommend testing the 4-Way connector on the vehicle with a circuit tester like # PTW2993. Test the pins on the connector while you have a buddy activate the signals in the van. If you aren't getting power to all the pins then I recommend testing the wires both before the converter...
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  • Installing Redarc Brake Controller in 2018 Kia Sorento Without Cutting Wires
  • The Redarc Tow-Pro Elite Trailer Brake Controller - 1 to 3 Axles - Proportional # 331-EBRH-ACCV2 will need to be installed using the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7. This will give you the circuit breakers, connectors, and wiring needed to connect your brake controller. Tapping into your 4-way brake signal will work to give you the brake lights but unfortunately the turn signal is found on that same wire, so it would combine...
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  • Wiring Wesbar Trailer Lights # 403026 and # 403076 to Trailer Wiring with Unknown Colors
  • Your Wesbar 102640 trailer light features a sealed capsule so the bulb itself cannot actually be replaced. I recommend simply replacing the light assemblies with the Wesbar # 403026 and # 403076. These are the newer/current generation model lights to what you currently have. On these light assemblies the white wire is for the ground, the brown is for the running light circuit and the yellow/green is the corresponding stop/tail circuit for either side of the trailer. You'd need...
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  • Troubleshooting Brake Controller E2 Error Code
  • The Hopkins Agility Trailer Brake Controller # HM47294 you asked from is most likely too new to get that E2 code like the older models (it would be SC instead) according to my tech contact at Hopkins. With either the SC or the E2 code, it is showing a short in the blue output wire somewhere between the controller and the brake magnets. This can be due to a pinched or broken wire, a bad ground wire, or it could be from a bad magnet as you stated. I recommend using a circuit tester...
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  • Troubleshooting the Electric Trailer Brake Controller on 2011 Chevrolet Silverado 2500HD
  • For your 2011 Chevy Silverado 2500 with integrated brake controller, the brake output wire will run directly from your controller to the 7-way. You can test the 5 o'clock pin of your connector for braking function using an incandescent tester like # PTW2993. An incandescent tester will draw power like a connected trailer would to give the unit signal that a trailer is connected to allow function. You can then use the manual override feature to test function. The light should get brighter...
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  • Troubleshooting Curt Trailer Wiring Harness # C56124 for 2012 Nissan Juke
  • There are a couple things to check before replacing the unit, which may be the answer. First, check your vehicle fuses as listed in your owners manual. There are specific fuses for trailer use on your vehicle. The second thing to check is the ground wire on your wiring harness. If the ground is bad and isn't getting the bare metal to metal contact it could have worked and then suddenly stopped working as you stated. Use a circuit tester like # PTW2993 to check functions. If all...
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  • Recommended 7-Way Wiring and Brake Controller for 2013 Hyundai Santa Fe
  • It's hard for me to say exactly how the 4-Way harness on your Hyundai Santa Fe is installed. The type of wiring you described in your question does not match up to how the wiring harnesses we have available for your Santa Fe will install, whether or not it has the factory tow package. If the Santa Fe does not have the factory tow package, the correct wiring harness will be the Curt T-Connector # C56184 or the Hopkins # HM11143984. Both harnesses will install by plugging into factory...
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  • Troubleshooting N.C. Message on Tekonsha Prodigy Brake Controller Installed on Nissan Frontier
  • The "N.C." message you are seeing displayed on your Tekonsha Prodigy Brake Controller, such as the P2 # 90885, essentially means that the brake controller is not detecting a trailer connection for some reason. I first recommend just making sure that you used the correct Plug-In Harness for your 2017 Frontier, which is the part # 3050-P. Otherwise, this error message be caused by a number of reasons. First, I recommend checking both the vehicle side and trailer side connectors for any...
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  • Troubleshooting Trailer Running Lights Not Functioning on 2013 Nissan Xterra Wiring
  • The one missing running light relay is a common issue on certain Nissan vehicles. It is usually a missing relay in the in-cab fuse panel and it is # 38666-1 but you can check the owner's manual for all fuse and relay locations to verify. The relay is attached to a wiring harness which is located behind the passenger side kick panel near the passenger door (see picture).
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  • Troubleshooting Solera Power Awning That Stopped Working
  • There aren't any fuses in the motor or arm. It is possible that the motor burned out or the drive head gears # LC353964 have gone bad. If you need a replacement motor then you will use the Solera Power Awning Replacement Motor # LC266149. The best way to test is to remove the head housing and use a circuit tester like # PTW2993 to check the wires going into the motor for power. If you have power going into the motor when you press the switch then you know that the motor is bad. If...
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  • Installing REDARC Tow-Pro Elite Brake Controller in 2018 Toyota Tundra
  • At this time there is not a wiring harness compatible with the 2018 Toyota Tundra models from any of our manufacturers. You will either need to use a circuit tester like # PTW2993 to confirm the pin functions on that harness you pictured and splice into it or you will need to hardwire your 7-way to your Tow-Pro brake controller using # 5506 or # ETBC7. I've attached a couple articles to assist.
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Info for this part was:

Expert Research:
Michael L
Expert Research:
Jameson C
Expert Research:
Adam R
Edited by:
Tyler C
Installed by:
Cole B
Installed by:
Jacob H
Updated by:
Sarah W
Updated by:
Erin H
Video by:
Shane H
Written by:
Erin H

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