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Quickee Circuit Tester

Draw-Tite Wiring

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2 reviews


Code:   3808

Retail:$34.41

Price:$24.95

Shipping Weight: 1 pounds

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Draw-Tite Wiring - 3808

Circuit Tester with hook
  • Alligator Clip for Grounding
  • Light Glows when Current is Present




Video of Quickee Circuit Tester


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

Video wiring 101 circuit testing faq
Circuit Testing for Vehicle Wiring
Video wiring 101 ground testing faq
Testing for a Correct Ground Connection Demonstration
Video Wiring Install 2010 Chevy Cobalt
Trailer Wiring Harness Installation - 2010 Chevy Cobalt

Video Transcript for Circuit Testing for Vehicle Wiring

Today we are going to show you a little bit of wiring. Basically, like a wiring 101 and what to look for when you are going to hardwire into a vehicle. And what hardwire means is actually getting to the wires and splicing into them making a connection. We will go ahead and do our test and ground it. Instead of piercing the wires, if you have a junction that is easy to get to go ahead and pull it apart. And instead of piercing the wire, go ahead and test on the inside here. Just check each individual contact here until you hit something. Then make sure you actually have your running lights on and then go ahead and turn them back off. It also proves to us that our ground is good and it is working with our electrical system here.

If you know which tab is your running light, you can go ahead and look on the back side of it and have a hole on the backside of it that matches the front. In our case it looks it would be the purple wire here. So the purple wire here, we know is a running light so we can go ahead and make our connection to that wire right now. You always want to do your wiring one circuit at a time. Take your running light wire, which on a 4 pole would be brown, make your connection and make your ground connection too at this point. And then, test on the other side of the 4 pole at the end where you have your running lights working. So when you test this, you want to go ahead and put your ground to the ground pole on the 4 pole. Then go ahead and use the probe to go ahead and test the running light circuit here. Do that one at a time. Also basically everything applies to the other circuits too. Your left turn, your right turn, and brake, if you have a 5 wiring system, and your running lights.

Once you have found your running light circuit, then you go ahead and make your connection. Go ahead and start with your left turn signal. So we will go ahead and turn on our left turn signal. We will just repeat the same steps for testing for that. There you have it. Now if you notice that it is blinking real fast that is because the car thinks there is not a bulb hooked up to it, because there is not. Once you make your connection and plug it back into the tail light it will go back to normal. The same thing applies to the stop light circuit. So just have somebody hold down the break pedal and you just go ahead and go through them all until you find it. Then have them let off of it then turn it back on. The reason you do that is to verify that it is your stoplight circuit. Sometimes they have a constant 12 volts going to some other electronic in your vehicle. If you test it, turn everything off and on to verify that you have the right wire. Also the same thing applies when you go over to the passenger side and look for your right turn signal, do it the same way.


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Customer Reviews

Quickee Circuit Tester - 3808

Average Customer Rating:  ratingratingratingratingrating4.0 out of 5 stars   (2 Customer Reviews)




- 3808

ratingratingratingratingrating by: Dan E.08/01/2012

Is this review helpful?


I was looking for a quick tester for auto and trailer circuits when only a go/no go result was needed. This unit has the desired "J" capture feature which makes one-handed testing easier. If functions as expected however the sliding capture portion has no built-in retention and I have temporarily "lost" it in the drive way several times. It would be an improvement if it would not fall off.50114

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- 3808

ratingratingratingratingrating by: James Gilmore08/01/2011

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Very nice tester 20690

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Ask the Experts about this Draw-Tite Wiring


  • Wiring Functions Lost All at Once
  • I agree, it sounds like a ground issue. Visually examine the grounding point on your trailer. Make sure that the ground wire from your trailer connector is securely attached to clean metal on the trailer frame. Also check the connector on the trailer, making sure it is not dirty, corroded, or damaged.
    view full answer...

  • Trailer Dome Lights Not Working
  • As long as everything is hooked up properly, your dome lights should be working. Use a circuit tester to test the wires going into your 7-way plug at the back of your vehicle. You can also check the fuse box to see if you have blown any fuses.
    view full answer...

  • Stop Light Wire Location on a 1993 Chevrolet Pickup for Wiring a Brake Controller
  • We have a video that should help you out. We did an install here on a 1993 Suburban. Our installers ran into the same problem. There were many wires on the stoplight switch and they are not easy to get to. So he located the wire along the steering column and spliced in there. On the Suburban, it was a white wire located in a bundle by where he mounted the brake controller. Skip to the 7:00 minute mark in the video and the installer explains where to find the wire. Make sure you use a circuit
    view full answer...

  • How to Troubleshoot a Trailer Blowing the Running/Taillight Fuse Only
  • Since 6 of your trailers are not having problems with the 7-Way connector on your vehicle, the problem must be in the 7th trailers wiring. I would start with making sure all of the ground connections are securely attached to clean, rust and corrosion free surfaces, just to be sure, although it sounds like a short circuit issue. Then, I would check the 7-Way trailer connector. Take it apart and check inside to be sure that the wire connections are not shorted somehow to the taillight circuit.
    view full answer...

  • Only Front Trailer Brakes Work with Prodigy and Only Rear Brakes Work with Breakaway Switch
  • It sounds to me like your trailer brakes are mis-wired. I would start by unplugging the trailer and checking for voltage at the brake output connection in the vehicle connector with a circuit tester, # 3808 if needed. Set the Prodigy to max voltage as you stated and make sure the vehicle is putting out voltage. It sounds like this will show that the prodigy is working properly. Next, Check the wiring on the trailer. I have posted a drawing that shows how the wiring should be installed on the
    view full answer...

  • Installation of a 7-Way Connector On a 2010 Chevrolet Silverado With 7 Bare Wires and No Plug
  • To get a 7-Way connector at the rear of your 2010 Chevrolet Silverado I would use a circuit tester like the Quickee Tester, part # 3808, and test the 7 bare wires for function. Then, use the Pollak 4 Foot Pigtail Wiring Harness, part # PK11998, to connect to the 7 bare wires by function using the included butt connectors. I would not connect them by colors because the colors will not always match the same function. After the wiring harness is attached correctly to your functioning bare wires
    view full answer...

  • Troubleshooting Brake Controller Not Activating Trailer Brakes on RV
  • Since the brake controller is not powering on, I would start by checking the black wire at the back of the brake controller with a circuit tester, # BTMT15. You should have constant 12 volt power to this wire. You should also check to be sure the white wire is properly grounded to the vehicle chassis, or the negative battery terminal. If those wires are correct, move on to the red wire. This wire should have no voltage until the brake pedal is pressed. With the brake pedal pressed it should h
    view full answer...

  • How to Test a 4-Way Trailer Wiring Harness Plug
  • You are testing correctly for the left and right turn signals, but the 3rd female plug you are testing is the taillight circuit. If you turn on the running lights you should get 12 volt power at the connection that the brown wire runs into. To test the brake lights at the trailer connector you need to apply the brakes and test the connectors that the green and yellow wires go into. These are the same connections that you tested for the turn signals. Trailer wiring combines the left turn/br
    view full answer...

  • Troubleshooting Electric Trailer Brakes Not Working on a 1973 WW Horse Trailer
  • There are a number of reasons why the brakes on your horse trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake feed circuit and ground are at the bottom of the connector so moisture affects these connections first. Next, check the ground wire on the vehicle and trailer connectors, trailer brake magnets and the brake controller itself. If there is a b
    view full answer...

  • Lights on Camper Trailer Go Out When the Brakes on Ford Truck are Applied
  • It sounds like you have a common ground problem. When the brakes are applied and the brake lights are illuminating, the highest amperage draw is placed on the wiring system and if you have a bad or loose ground, you will have problems with lights. You will want to inspect to make sure all the light assemblies have a good clean ground connection to metal that is free of rust and paint. You will also want to make sure the trailer and vehicle side connector have a good ground connection. Inspec
    view full answer...

  • Trailer Brakes Lock Up Behind 1995 Chevy 2500 but Not Behind a 2004 Ford F-350
  • First, the 1:00 pin if looking at the face of the trailer connector on the vehicle is the 12 volt power lead. If the corresponding pin on the trailer goes to the brakes then that could be why they are looking up. Also, the corrosion that you see sounds like it is on the ground pin. Corrosion can cause a short to the brake circuit and could lock up the brakes. Corrosion can also build up behind the plugs where the wires attach and cause some problems. Get all of the corrosion cleaned out o
    view full answer...

  • Both Trailer Turn Signals Blink when Running Lights Are on and Turn Signals Engaged
  • This does sound like a ground problem. If it only happens when the running lights are in it indicates a ground issue because ground problems normally show up when there is more of a load on the system. First, make sure that the main ground from the trailer plug is attached to a clean and corrosion free bare metal surface. Next, go back to the lights. Most trailer lights ground through the mounting studs if there is not an obvious ground wire. In either case, the grounds have to be attached t
    view full answer...

  • Locating and Repairing Poor Ground Connection Causing Turn Signals to Flash Together
  • As you suspected, you have a poor ground connection at some point. It is important to have a continuous ground connection from the tow vehicle, to the trailer and continuing on to the trailer lights. The trailer connector on your F150 needs to be grounded to clean metal. The connector on the trailer will be grounded to the trailer frame, usually on the trailer tongue. Make sure this connection is clean and free of corrosion. The trailer lights will receive their ground connection either by th
    view full answer...

  • Turn Signals and Brake Lights Do Not Work on Trailer Towed with Ford F-350
  • The best way to determine if the issue is indeed on the truck is to use a circuit tester like part # 3808 and test each individual pin on the connector as its function is activated. First you will want to clean the connector and make sure there is no corrosion on the pins. You may also need to remove the wires from the connector as corrosion can build up in the connector. If all of the connection points are corrosion free, then begin testing the pins or the wires themselves. If you find t
    view full answer...

  • Trailer Running Lights Turn On Faintly When the Turn Signals are On
  • The most likely culprit is a bad ground. I know you have spent a lot of time on the grounds but it is still possible especially if you have an aluminum frame or tilt trailer. But something else that could be causing this is a dirty or corroded trailer connector. This could cause some bleed over to the running light circuit. Clean out the vehicle and trailer side connectors and see if that fixes the problem. If not then you are looking at a ground issue. Any corrosion where the lights attach t
    view full answer...

  • Testing the Brake Output Circuit on a 2006 Ford Dually with a Factory Integrated Brake Controller
  • The first thing you will want to test is that power is reaching the 7-way trailer connector on your 2006 Ford dually from the brake controller with a circuit tester like part # 3808. Have an extra set of hands to activate the manual override on the brake controller with the power set to the max. When looking at the 7-way trailer connector at the rear of your truck, test the pin in the 5 o clock position (see photo). If you do not have power at this pin, then there is an issue with the brake
    view full answer...

  • Troubleshooting a Brake Controller that is Not Activating Trailer Brakes
  • So your brake controller seems to be functioning but the brakes are not applying on your trailer. The first place I would check would be the brake output circuit on the trailer connector that is on your vehicle. You will want to use a circuit tester like the # 3808 to test for voltage on this circuit. I attached a video that shows you the idea on how this is done, but you will be testing the brake output circuit for voltage that ramps up while a buddy applies the brakes. I attached a pic of what
    view full answer...

  • 4-Way Trailer Connector on a 2008 Toyota Highlander has Power with Vehicle Off
  • The wiring harnesses for the 2008 Toyota Highlander all have power that goes to the converter box so it is possible that the pins could have some power to them all the time. The power may be enough to light the test lamp but is probably not enough to power on the trailer lights. You can confirm this by plugging in a trailer. Curt wiring harnesses have been known to do this but I have not heard of this issue on other brands. You will also need to make sure that if your harness requires a separ
    view full answer...

  • Fifth Wheel Trailer Brakes Not Braking Enough with Controller Turned Up All the Way
  • Ideally, the trailer brakes would be braking in such as way as you cannot tell they are braking but I do not think that is the issue here. It sounds like there may be some voltage loss somewhere. With the controller output set up correctly and the brakes adjusted, you can check a few other things to determine where the problem is. Start by severing the blue wiring from the back of the controller a few inches. Use a circuit tester like # 3808 if needed to test the end coming from the brake con
    view full answer...


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Info for this part was:


Written by:
Lindsey

Edited by:
Leah

Test fit by:
Patrick

Video by:
Zack

Expert Research
Bob

Expert Research
Mike H

Expert Research
Jeff

Expert Research
John H

Expert Research
Jameson

Expert Research
Mike L

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