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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 800-298-1624 for expert service.
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  • Reviews (6)
  • Q & A (2280)
  • Videos (1)
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  • Why etrailer?

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   (6 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.

- PTW2993

Probe works really good

- PTW2993

- PTW2993

- PTW2993

- PTW2993

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


Ask the Experts about this Performance Tool Wiring

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    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56272 should not have changed the speed of your turn signal, so I recommend using a circuit tester like # PTW2993 to test the wires. Next I recommend checking the connections for bent pins and using a little dielectric grease # 11755 on the connections to give you a connection free of debris and moisture. Then doublecheck the ground connection on the harness. Make sure the connection is bare metal to...
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  • Installing Brake Controller in 1999 Toyota Land Cruiser with Factory Tow Wiring
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  • Troubleshooting Left Side Tail Lights Not Working on Trailer
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  • Trailer Taillights Not Functioning, Reading 3.5 Volts at Trailer Connector
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  • How to Install Ground Wire To Trailer Connector on Utility Trailer
    Grounding through the ball doesn't work well, as you've found. If the current harness doesn't have a ground circuit, the wiring must be fairly old as it's pretty typical for a trailer connector to have a ground circuit. The fact that you're blowing fuses leads me to believe you might also have a short circuit in one or both your turn signal/brake lamp circuits. You'll want to replace the existing wiring harness on the trailer. This is pretty simple to do, and will only take an hour or...
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  • How to Find the Cold Side Brake Switch Wire on 2017 Chevrolet Colorado
    The best way to find the cold side brake switch wire in your 2017 Chevrolet Colorado is to simply test the wires using a circuit tester like # PTW2993. You will want to find the wire that only has power when the brakes are applied in the vehicle. Depending on what you are installing, you may also be able to use the bundle of wires that should be located behind the dash, to the left of the emergency brake pedal. This bundle is typically used for installing a brake controller. Looking...
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  • 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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  • Running Lights Not Working on 4 Star Trailer
    If you do not have any running lights on your trailer, I recommend first testing the trailer connector on the vehicle to rule that out as the cause. Turn the headlights on, and use a circuit tester like # PTW2993 to test the socket on the connector fed by the brown wire. If you are not getting any signal on this pin, it is possible that there is a blown fuse. Next, make sure that the ground wire from the connector on the trailer is securely grounded to the trailer frame, and that each...
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  • 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.
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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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    The first thing to check is the center pin of your 7-way when your vehicle is put in reverse. This pin should have 12V power when put in reverse and no signal when the vehicle is not in reverse. The easiest way to check this is using a circuit tester like # PTW2993. If you have this function on your vehicle, then you likely have a ground issue on your trailer. If you don't have this function, then you will need to trace your reverse light function wire to find the short by probing every...
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    Thank you for the picture of the factory brake controller wiring in your truck that I believe is a 2006 Dodge Ram. I can tell you how it's "supposed" to wire up to your brake controller so that we can from there eliminate that as the problem and see where the problem might be. So the wire labeled ground goes to the white wire of the brake controller, the one labeled trailer brakes goes to the blue wire of the controller, the one labelled 30 amps max goes to black wire of the controller,...
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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.
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    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....
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    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...
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  • Troubleshooting Brake Controller that Gets Warm to Touch
    How old is the brake controller? Does it still seem to be working properly? Overheating brake controllers aren't common but it would most likely indicate a short. I can help you troubleshoot the controller though. Testing the brake controller is fairly easy. Sever the blue brake output wire near the brake controller leaving enough room to reconnect it and then apply the manual slide. Using a circuit tester like part # PTW2993, you should get output to the controller side of the wire...
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  • Troubleshooting Trailer 7-Way With Only 6 Wires on 2003 Hudson Trailer
    There are flags going up as soon as you say there is no white wire, because white is traditionally the ground and you absolutely will need a ground for everything to work. So, you will need to determine function based on location and not on color. You can use a battery to test each wire for function so you will connect that wire to the correct location. I've attached an article to assist as you requested. The missing wire is most likely the reverse/auxiliary wire on your 2003 Hudson...
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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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  • Troubleshooting Trailer Wiring Running Lights Only Work
    First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # 3808 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached. If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue. Make sure that the trailer side connector are clean...
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  • Finding the Cold Side of the Brake Light Switch in a 2017 Jeep Cherokee
    In your 2017 Jeep Cherokee Latitude, I unfortunately can't tell you which wire is the correct color for your brake controller, but I can tell you how to determine that. You will need to use a circuit tester like # PTW2993 and test each wire coming out of that switch. The correct wire will have no signal when the pedal is not pressed and the switch not engaged but will have signal when the pedal is pressed and the switch is engaged. That wire will need to be connected to the red wire...
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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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    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...
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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...
    view full answer...
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  • Troubleshooting Brake Lights Not Working on Tow Vehicle
    Sounds like you have a blown third brake light fuse on your tow vehicle if you can get all of the other functions to work but not the brake lights. Check out the fuse box of the vehicle and replace that fuse and you should see the lights work like they should.
    view full answer...
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    This is most likely a trailer grounding problem as indicated by your report that (all) trailer lights sometimes flicker and do not work at all if the trailer is not hitched (grounded) to something. First check the ground point at the tongue of the trailer. From the trailer electrical connector you will find a white wire. Follow that to the nearby end where you will find a ring connector crimped to the end and then screwed to the trailer frame. I would ensure that the ring connector...
    view full answer...

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Info for this part was:

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

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