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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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  • Reviews (2)
  • Q & A (2109)
  • Videos (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

  • How to Test Brake Controller without Trailer Connected
    All the brake controller needs to sense a trailer connection so that you can test it is a slight amperage draw on the output circuit. For that you can use a circuit tester like the part # PTW2993 with one pin grounded and the other on the output pin. Then you can hit the brake pedal of the vehicle and you should see the brake controller operate like normal. You'll need someone to help since it's hard to be at the rear of the vehicle and pressing the brake pedal. If you can't get the controller...
    view full answer...
  • Troubleshooting No Running Lights on Trailer with 2017 Ram 2500
    I took a look at the online owner's manual for your 2017 Ram 2500 and did find a couple additional fuse locations that you can check that are related to the trailer signal lights. The F11, 30 amp fuse that you mentioned changing actually looks like it is for the integrated brake controller on the truck. I recommend also checking the F29, 20 amp blue fuse,along with the F30, 30 amp pink fuse. These are both for trailer lighting so you will want to make sure they are present and in working...
    view full answer...
  • Testing Electric Brakes on Trailer without Connecting to Tow Vehicle
    Absolutely! If you would rather not connect the trailer to your tow vehicle, you can simply use a separate car/truck 12V battery to test the electric brakes on your trailer. You can apply power to the appropriate brake input pin on the trailer connector (or the wires directly at some point behind the connector) and that will send power to the brakes.
    view full answer...
  • Where Does Trailer Wiring that is Brown/Yellow and Brown/Green Attach on Trailer with Solid Brown
    You do have the wishbone trailer wiring setup. What that means is that if you have a solid brown wire it attaches to the brown and green wire as well as the brown and yellow wire. Yellow goes to left stop/turn, green goes to right stop/turn, and white is ground.
    view full answer...
  • Troubleshooting Trailer Running Lights Not Functioning on 2016 Dodge Ram 1500
    Most likely the problem is actually a weak ground on the trailer based on what you said. The running light circuit activates the most lights on a trailer so if you have a weak ground that circuit will be where it shows up. Try cleaning the pins of your trailer wiring connectors and improving the grounds of the lights and most likely you'll see the circuit come back on. Also you can check to verify the 10:00 pin of your 7-way has 12 volts when the running light circuit of your truck...
    view full answer...
  • Where do Trailer Wire Colors Green, Yellow, Brown and Red Run To
    Most likely the colors would match with the exception of the red wire on the trailer going to the white wire on the truck. The white wire is the ground circuit so you can trace the RED wire on the TRAILER to see if it attaches to a metal surface on the trailer or to the grounds of all the lights. I attached a help article on trailer wiring for you to check out as well.
    view full answer...
  • Trailer Running Lights Not Working on 2017 Ram 3500
    I apologize if any of this is redundant but let's first start off by making sure we are testing the correct pin. The correct pin on the vehicle side 7-way trailer connector for the running lights should be in the 11 o'clock position. The wire that leads into this pin should be brown but it can be a different color. I know you said you have checked the fuse already but again just to clarify you should be looking at the F29 terminal for a blue 20 amp fuse. The fuse may not look bad but it...
    view full answer...
  • Troubleshooting Trailer Brake Light that Stays On All the Time
    It sounds like something is causing a short on your vehicle or trailer wiring that is causing the brake light circuit to remain powered at all times. I recommend first taking a look at both the vehicle side and trailer side connector, checking the pins for any corrosion or build up, simply cleaning as needed. If the connectors look okay, you can trace the wiring back from the vehicle connector and look for any frayed or damaged portions. Look specifically for exposed areas of 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...
  • Turn Signals on Trailer Not Working When Running Lights are On
    The most likely cause for the turn signals not to work when the running lights are on with your trailer is a bad or weak ground. It's very possible that a weak ground connection can be just strong enough to allow sufficient current for some lights to pass, but not enough for everything. With the running lights on, there may simply not be enough power to also activate the turn signal lights. Considering that all of the trailer rear light functions appear to work fine individually, this is...
    view full answer...
  • Troubleshooting Trailer Brakes Blowing Fuse When Truck Brakes Are Applied
    Since you know there is a short in the braking system itself, I recommend starting with testing your trailer magnets. I've attached an article to help you with this. If the magnets check out then you know you have a short in the wiring. I recommend testing the wires with an incandescent circuit tester like # PTW2993 and probing the wire until you find the issue. Replace wire as needed with # 10-1-1.
    view full answer...
  • Troubleshooting No Power to 12v Terminal of 7-Way Connector on Truck
    It sounds like the trailer tow fuse may be blown or missing on your 2011 Ram 3500. It is located in cavity J01 in the under hood fuse box (Totally Integrated Power Module). It is a pink 30 amp cartridge fuse. The other trailer tow fuses are related to the lights or brake controller and would not affect the 12 volt circuit on the 7-Way connector. To test for wire function I recommend the circuit tester # PTW2993.
    view full answer...
  • Troubleshooting Low Voltage At Vehicle Side Connector for Trailer Right Signal Lights
    Since you found low voltage when testing the right side signal light pin on the vehicle connector, you have at least isolated the issue to the truck. If all the wires appear to be in good condition, then the issue is likely either a weak ground like you mentioned, or possibly with the connector itself. Starting with the easier potential solution, I recommend taking a look at the 7-Way on your Ram. Check for any debris or corrosion that might be built-up behind the pins, specifically...
    view full answer...
  • 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 Right Tail Light on Trailer that Stays On with Vehicle Ignition Off
    When a trailer's tail light remains on when the vehicle is shut off, this usually indicates some kind of short in the wiring. I first recommend using a circuit tester like # PTW2993 to check the vehicle side connector. You will want to see if there is constant power coming from the tail light circuit on the connector (brown wire). While there, also check for any corrosion or debris inside both the vehicle and trailer side connector and simply clean out as needed. If you are in fact...
    view full answer...
  • Does a Breakaway System Battery Affect Everyday Trailer Brake Performance
    Electric trailer brakes can work on a trailer that doesn't have a breakaway system. So the answer to your question is no, the breakaway battery would not affect how normal trailer brakes will operate under normal circumstances. The only time the breakaway battery will change how the brakes are performing is when the pin of the system has been pulled and the voltage of the battery is being applied to the brake assemblies. I attached an FAQ on breakaway systems plus an FAQ on troubleshooting...
    view full answer...
  • Does Trailer Lighting Ground Through the Hitch Ball
    In some cases trailer lighting will ground through the hitch ball but that's typically only if the actual ground circuit is insufficient. This is not an ideal setup. It needs to ground through the wiring of the trailer harness. You can test this by setting the coupler on the ball and if it works you know the ground of the trailer needs to be improved. Otherwise you'll get intermittent lighting functions when your trailer hits bumps. I attached a couple help articles for you to check...
    view full answer...
  • 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...
    view full answer...
  • Troubleshooting Dim Turn Signals on Trailer with Running Lights On
    I am not sure what vehicle you have, or the particular wiring harness you have installed, but most likely a heavy duty flasher is not necessary for the turn signals to properly illuminate on the trailer. What you are describing sounds like a possible weak or bad ground somewhere on the vehicle or trailer wiring. A weak ground will often allow some lighting functions to work, but when an additional lighting function is activated (such as turn signals with the running lights already on, in...
    view full answer...
  • Troubleshooting No Power to Trailer Connector on 2012 Ford F-250
    If all the fuses and relays appear to be in good shape on your 2012 Ford F-250, then it's possible that there is an issue with the wiring behind the trailer connector. I recommend first simply inspecting the connector itself for any corrosion and making sure the wires are securely attached. Then trace the wiring forward on the truck as far as you can, looking for any damaged areas, exposed wiring or loose connections, simply fixing as needed. If your F-250 has the factory 7-Way, you can...
    view full answer...
  • Troubleshooting Wiring Issue On Harbor Freight Trailer
    It does sound like you have done the ground wiring well. I recommend putting a circuit tester like # PTW2993 on multiple spots as you test wiring from the truck to the trailer lights. Starting at the truck with the trailer disconnected, test each function of your 4-way. If all checks out, add the extension and check each function. If that checks out, then test right behind the trailer wiring connection to that extension. If everything works at this point, you have 100 isolated the...
    view full answer...
  • 7 Way Trailer Connection Troubleshooting
    Yes. It sounds like there is no signal being sent from your 7 way connector to your trailer, or it is not being received for the stop and turn lights. I recommend using a circuit tester like # PTW2993 to check the functions at your truck first. If you are getting signal on the posts on the truck you know the problem is in the trailer wiring, and if you are not getting signal there, you have isolated the issue to the truck first. You will need to splice into the wires at your tail lights...
    view full answer...
  • Troubleshooting Factory Brake Controller Issue In 2005 Ford F-250 With Factory Brake Controller
    On your 2005 Ford F- 250, the factory brake controllers are always having issues with certain trailers. I've attached an article to help you check your brake magnets to see if that is your issue. There are many possible causes and compatibility issues depending on your trailer application. I've attached some info to help. To see if your vehicle is sending proper signal, use a circuit tester like # PTW2993 to check the 5-o'clock pin on your 7 way. This should give signal when you...
    view full answer...
  • Troubleshooting 2014 Ram 1500 Trailer Functions Not Working Correctly
    It sounds like the trailer connection itself may need to be cleaned as sometimes functions get debris or corrosion that causes them to not work properly. Another possibility is that your ground wire connection to your truck frame may need to be cleaned up for a bare metal to metal connection. Sometimes a ground will allow some functions to work and not others if is not as solid as it should be. I recommend using a circuit tester like # PTW2993 to test each function. I've attached...
    view full answer...
  • Turn Signals Reversed On Trailer Only When Running Lights Are On
    It sounds like there is a ground issue on the trailer, which can cause all kinds of strange things to happen with regards to the signal lights. The reason it is only showing itself when the running lights are on, is because of the additional load they are putting on the system. The current ground may be strong enough for the turn signals to activate properly by themselves, but when an additional function is activated, there is not enough power for everything to function properly. I...
    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...
  • Electric Trailer Brake Controller Not Displaying Number When Brake Pedal Applied
    The most probable cause for not getting a display when you apply the truck brake, but getting a display when manually activate the override is a bad connection in the stop light circuit. The stop light circuit is the red wire coming off the brake controller that goes to the cold side of your brake pedal switch. It may still be working on the trailer in part because the inertia sensor may still be working in the brake controller. I recommend using a circuit tester like # PTW2993 to...
    view full answer...
  • Troubleshooting Blown Vehicle Fuses Every Time Trailer is Connected
    It sounds like there is a short somewhere along the wiring of your vehicle or trailer that is causing a fuse to blow every time you connect. The first thing I recommend doing is disconnecting the trailer and using a circuit tester like # PTW2993 to test the vehicle side connector. You can have a buddy run through the functions from inside the vehicle while you test each pin on the connector. If you detect any power to a circuit when there should not be any, then you know there is a...
    view full answer...
  • How To Ground 2 Wire Trailer Light that Replaces 1 Wire Trailer Light
    Yes, what you described is exactly how to ground a trailer light that replaces a light that used to ground through the mounting hardware. Just run the ground wire to the mounting hardware and you'd be good.
    view full answer...

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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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