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Hook Probe Circuit Tester

Hook Probe Circuit Tester

Item # PTW2993
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Performance Tool 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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  • Videos (1)
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  • Used (1)
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Performance Tool Wiring - PTW2993

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

  • 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.

Customer Reviews

Hook Probe Circuit Tester - PTW2993

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

- PTW2993

I had a tester like this years ago and I broke the end off. I really liked the tester as you can hook it over a wire and probe it to see if you have voltage. Been looking for one for a long time. You can find cheap junk ones but this one is just like the good one I had years ago. Glad I found it and is is very well built. Should last me a long time. Was shipped fast also. Will try and not break this one. Thanks e trailer. 847531

- PTW2993

Very friendly service, thank you Korren. Ordered on Tuesday, received on Thursday. 773910


Ask the Experts about this Performance Tool Wiring

  • 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...
    view full answer...
  • 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...
    view full answer...
  • Troubleshooting Brake Controller that Only Works With Manual Override
    Did you check to make sure the red wire of your controller has 12 volts when the brakes are applied? That's the circuit that would be at fault if the controller itself is still good. I'd verify that you have 12 volts on the red wire of the controller with a circuit tester like part # PTW2993 and if it does then the controller is faulty. If not, then the wiring for that circuit is bad. You'd need to check the condition of the connection for the red wire and then also check the fuse for the...
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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 Intermittent Running Light Failure on 2017 5th Wheel Trailer
    I'll start off by saying that this could be as simple as a ground wire issue, so you'll want to make sure that the trailer end of the plug is grounded properly to a paint and rust free spot on your trailer and that it is secured tightly. If this doesn't correct the issue you'll need to locate the running light circuit on your trailer's 7 way connection, which when looking at the plug's socket, will be in the 11 o'clock position. From there, I would first make sure that the pin/blade...
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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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  • Troubleshooting Trailer Wiring Where Blinkers Operate Backwards and Some Assemblies Dont Come On
    What you described sounds like a combination of a weak grounds for the lights and backwards wiring. For the assemblies that won't turn on try finding a way to improve the grounds. You can do this by running the wire back from the assembly to the main ground harness of the trailer. Then you want to make sure the correct blinker circuit is associated with the correct wire on the trailer. Starting over with all new wire is an option, but I think just running the ground wires all back...
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  • How to Allow 12 Volt Accessory Circuit of 7-Way to be Active All the Time
    Sounds like you have a 7-way trailer wiring connector and the 12 volt accessory circuit turns off when the vehicle is turned off. The only way to bypass that so that the circuit is on all the time is to run a length of 10 gauge wire like part # 10-1-1 from the positive post of the battery through a breaker like # 9510 to the 12 volt accessory circuit of the 7-way which happens to be the pin in the 1:00 position.
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  • Fantastic Vent Ceiling Fan Won’t Open or Close
    The most common problem when a fan like the MaxxFan Plus Roof Vent part # MA00-04500K will run the fan but won't open is the Replacement Rain Sensor for MaxxAir RV or Trailer Roof Vent Fans part # MA34FR . I would first attempt to clean the sensor really well and check for operation. If it works your good to go. If it doesn't use the replacement sensor listed here.
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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 Trailer Taillights that Behave Strangely and Random Circuits Light Up with Blinker
    What you described is the classic and super bizzare insufficient ground scenario. It's hard to explain how it all works, but basically if you improve the ground wiring of the trailer you'll see that the lights will all come back like they should. Check the main ground wire that goes from the connector to the frame and then make sure all the lights are grounded properly as well.
    view full answer...
  • Grounding Peterson Trailer Tail Light Part # V457L to Trailer Frame
    The Peterson Trailer Tail Light # V457L that you referenced is designed to ground through the mounting hardware which means that a bolt runs through the base which is attached to the ground circuit of the light and when it contacts the metal frame of your trailer the ground circuit is complete. If you wanted to ground this light with a wire you'd need to run the ground wire to the bolt you use to attach the light between the base and the trailer frame. The white wire on your 7-way wiring...
    view full answer...
  • Where is Cold Side of Brake Switch Normally Found
    The phrase "the cold side of the brake switch" refers to the circuit at the brake switch that carries voltage only when the vehicle brakes are applied. This circuit varies widely from vehicle to vehicle so the best way we can recommend you find it is to use a circuit tester like part # PTW2993 to test the wires of your brake pedal switch till you find one that only carries voltage when the brakes are applied and none when released.
    view full answer...
  • 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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  • Troubleshooting Trailer Running Lights Not Working with 2006 Nissan Murano
    There are a few possible reasons why the trailer running lights aren't working with the connector on your 2006 Nissan Murano. It sounds like you may have already done this, but if not, I recommend starting by testing the connector itself on your Murano with a circuit tester like # PTW2993. Test the running lights pin on the connector with this function activated on the vehicle to see if you get power there. If you don't get power, you at least know the issue is somewhere on the vehicle....
    view full answer...
  • Options for 7-Way to 6-Way Adapter
    The Hopkins 6 Pole to 7 Pole Adapter, # 47435, does have a pin for the brake output for a brake controller. This adapter will work for your set up as long as the center pin of the 6-way plug on your RV is for 12v power and the pin in the 10 o clock position is for the brakes. You can verify this using a circuit tester like part # 3808. If the center pin on your 6-way plug is wired for brakes and the pin in the 10 o clock position is for 12v power, then you can still make an adapter using...
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  • Finding Brake Switch Output Cold Side for Electric Brake Controller on 2010 Jeep Wrangler Unlimited
    The cold side of the brake switch is located behind your brake pedal. You will need to use a circuit tester like # PTW2993 to test the wires to the switch. There will be a constant power 12v that will come into the switch and the wire you are seeking is one that has no signal when the brake pedal is not pressed, but has the signal when the pedal is pressed. So it is cold (not showing power) when the pedal is up and is hot (showing power) when the pedal is pressed. I've attached...
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  • Troubleshooting Brake Controller Short Code
    Since you have inspected all the connectors, the short can absolutely be on the trailer itself. It can be in the wiring leading to the brake magnets, the brake magnets themselves, or a bad ground on an electric brake system. Because you referenced Servo, I assume you have hydraulic brakes and an Electric Over Hydraulic (EOH) actuator. This issue can only be between the electrical components in such a case, so it will not be all the way back at the wheel cylinder servo. I recommend...
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  • No Power On Running Light Circuit Of Vehicle
    It sounds like either you have a bad ground on the truck at the 4-pin or 7-pin connector or there is a bad/missing fuse. Since you are not getting power at the running light circuit only, it is a good idea to check the owner's manual of your vehicle for the fuse location of the trailer tow park lamp or any other fuses related to towing in your vehicle. If you double check the fuses and there are not any missing or damaged, check the ground on the connectors to make sure they are grounded...
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  • Wiring Colors At The Trailer Connector On The Back Of A 2007 Chevrolet Silverado Classic
    The wiring of a typical 7-way trailer connector is color coded and standard for factory wiring as well as aftermarket application. I've attached a photo to help. If the colors don't match up, you will need to text function based on location using a circuit tester like # PTW2993. Let me know if you need further help.
    view full answer...
  • Troubleshooting Tail Light/Running Lights on 2006 Class C Lexington GTS Motorhome
    I recommend checking your light bulbs first and then your ground connection as that is often times the issue if you have some functions and not others. You will want to make sure the ground wire is connected to bare metal and is free of corrosion or debris. If you ground connection is solid, then you will want to use a circuit tester like # PTW2993 to test wires and check fuses (check owners manual for locations). This will help you find a short in a wire if there is one so you can...
    view full answer...
  • Troubleshooting Lack Of 12V Power On 7-Pin Trailer Connector When All Other Functions Work
    I recommend checking your fuses and relays on your 2016 Ford F-250 under the hood in the fuse box. I recommend also checking for loose cables and testing the wires with a circuit tester like # PTW2993 to see if you can isolate the short. If it is a factory 7-way, and both the fuses and relays are good and you can't find the short, you can either take it to a dealer to have them check it out or you can run a separate wire. To run a new wire from your battery, I recommend the # 10-1-1...
    view full answer...
  • How to Test Vehicles Brake Controller Wiring to Determine Wiring Function
    If the wiring you found is correct for installing a brake controller it's not the standard colors we are aware of for a Ford truck. So what you'll need to do is use a circuit tester like part # PTW2993 to test the wires for function and then wire accordingly to the Reese brake controller. Which the controller wire colors are white for ground, black for 12 volt power, blue for brake output, and red for brake light circuit. The 12 volt circuit will be one that has power all the time, the...
    view full answer...
  • Where Does 12 Volt Accessory Wire Run to on Trailer Wiring
    Sounds like you are talking about the 12 volt accessory circuit of a 7-way and are asking about where it would need to get ran. Normally this circuit goes to the positive post of a trailer battery and is used to keep the battery topped off but it can also be ran to power exterior or interior trailer lights.
    view full answer...
  • Recommended Electric Trailer Brake Controller for 2018 Chevy Equinox with Factory 7-Way Connector
    I reached out to my contacts at both Tekonsha and Curt and they have not confirmed the wiring connections on a 2018 model Chevy Equinox. In previous years, there has not been a direct plug option for a brake controller but there also was not a 7-way factory available. It is very likely that there are wires under the dash that may work, but you would need to use a circuit tester like # PTW2993 to confirm. For a brake controller, I recommend the Tekonsha Prodigy P3 # 90195. This brake...
    view full answer...
  • Where to Find Brake Controller Stoplight Circuit Wire on 2017 Dodge Grand Caravan
    When we had the chance to install a brake controlelr in a similar 2014 Dodge Grand Caravan we found that the correct brake signal wire was white with a green tracer. I'd recommend looking for that wire first and then using a circuit tester like part # PTW2993 to verify that it has 12 volts only when the brakes are applid and use it for the red wire of your brake controller. I attached an install video for the Grand Caravan down below that shows the entire process as well.
    view full answer...
  • Installing Brake Controller in 1999 Toyota Land Cruiser with Factory Tow Wiring
    Because you have a plug under your dash, you will want to use a circuit tester like # PTW2993 to determine wire functions. You will need to find the 12V constant power and that will connect to the black wire of your brake controller. Then you will want to find the wire that only gives signal when the brake pedal is pressed. It should not give any signal without the pedal pressed, but should light up your tester when it is. This wire will connect to the red wire of your brake controller....
    view full answer...
  • Parts Needed for Always-On 12V Circuit on 2018 Ford F-150 with Factory Wiring
    The 12V auxiliary power circuit in your Ford's 7-way wiring setup is unusual. This circuit becomes active once you press the brake. It will otherwise appear to be dead. So unless you are driving there will not be power on that 7-way contact. This decision by Ford has caused a lot of confusion for Ford owners. If you want your 7-way 12V circuit to be active at all times, regardless of the ignition key position or operation of the brake pedal, all you need to do is bypass the existing...
    view full answer...
  • Wiring Diagram Recommendation for 4-Way Round Trailer Connector
    Looks like you have a round 4-way connector in the picture you submitted. The colors you mentioned aren't totally a match for standard colors but they are close. Normally the colors are: White - Ground Return Green - Right Turn and Brake Lights Yellow/Red - Left Turn and Brake Lights Brown - Tail Lights You'll need to wire by function instead of color since yours aren't a total match. I have attached a photo that shows typical wiring for a 4-way round connector.
    view full answer...

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Notes: May have damaged packaging or minor cosmetic blemishes.

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Info for this part was:

Expert Research:
Mike 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
Video by:
Shane H
Written by:
Erin H

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