See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

• Both Trailer Turn Signals Blink at the Same Time
  This is normally related to a bad ground connection somewhere. Make sure the main trailer connector ground and the grounds for each of the lights are all connected to clean and corrosion free bare metal surfaces. Also make sure that the vehicle side and trailer side connectors are clean and free of corrosion. If you are using a 4-Way harness then these are the most common issues. If you have a 4-Way but it has 5 wires coming out then this is a wishbone harness and it will have the running...
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• Why Do Some Vehicles Need a Converter to Add Trailer Wiring Like a 2001 Chrysler Town & Country
  Converters are required when a vehicle has what is called a 3-wire or separate lighting system. These systems will have turn signal circuits that are separate from the brake light circuits. Trailers use a 2-wire or combined system meaning the brake lights and turn signals are on the same circuit. A converter is needed to take the separate signals from the vehicle and combine them so that the trailer lights operating on a combined system will work properly. Wires and fuses connected directly...
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• No Power To Running Light Pin On Vehicle Trailer Connector
  It sounds like you are having an issue with the running lights on your trailer. If that is the case then since you have tested the trailer connector and found that power is not reaching this, you either have a blown fuse, bad converter, or shorted wire. I didn't catch what vehicle you have nor what trailer wring harness you are using but if it is a factory harness then most likely you just have a blown fuse. I know you said you checked the fuse but the vehicle's tail lights and trailer's...
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• Fuses for Trailer Light and Power Functions in 2014 Jeep Grand Cherokee Laredo
  I checked the online version of the owner's manual for the 2014 Jeep Grand Cherokee Laredo and according to information starting on page 574 the following fuse positions relate to the various trailer lighting and related circuits. There are multiple circuits relating to trailer lights. The cover of the power box in the engine compartment may also provide details on the appropriate fuses for each of the circuits. F11 30 Amp Pink - Trailer Tow Electric Brakes F28 20 Amp Yellow - Trailer...
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• Troubleshooting Why Left Turn Signal Will Not Work On Boat Trailer
  I would first check the bulb of the left tail light and make sure that the socket is not corroded or damaged. You would then have to trace the wire for the fixture looking for any pinched or broken wires. I would also recommended looking for cracked or worn down wires that would allow the copper conductor to come into contact with any metal on your trailer. To make the process easier you could use The Hook Probe Circuit Tester # PTW2993 and start tracing the circuit from the trailer connector,...
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• Could Black Wire of Trailer Wiring be the Ground Wire
  Most likely that black wire is the ground since it's the only circuit not accounted for and is thicker than the other wires. It's not uncommon for trailer wiring to not be the standard colors. I attached a trailer wiring diagram for you to check out as well.
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• Troubleshooting Trailer Wiring Harness on 1999 Jeep Cherokee
  If you have tested the 4-pole connector on the # 118376 and found that you have voltage at the running light pin but not at the right turn/brake and left turn/brake pin, you will need to troubleshoot the converter box. Have a helper sit in the drivers seat so they can activate the various lighting functions. Test each function on the input side of the converter box. With the right turn signal activated, you should show voltage on the green wire entering the box. The same goes with the...
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• Which Fuse on 2014 Ford F150 Protects Trailer Running Lamp Circuits
  There is one 20A fuse and one relay in the engine compartment fuse block for the trailer running lamps. The relay is in location # 6, and the 20A fuse is in location # 67. Try swapping an adjacent relay into the # 6 location, to see if that makes a difference. Then, check the fuse in # 67. If it's blown, replace it but before you plug a trailer back in, you'll need to find out why the fuse blew. Examine the trailer connector on the truck, looking for green or white corrosion on the pins,...
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• Troubleshooting Trailer Lights Not Working When Connected To 2013 Ford F-150
  Since the tail lights on your trailer do not work when the trailer is plugged into your 2013 Ford F-150 SuperCrew 4WD you likely have a blown or missing fuse(s). I recommend checking that the fuse 73 is installed and isn't blown. This fuse controls the trailer turn signals and brake lights. If your running lights are not working then check that fuse 67 is installed and isn't blown. If both of the fuses check out then I recommend checking that the trailer connector on your truck does not...
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• Utility Trailer Lights Go Out When Vehicle Brakes Are Applied
  It sounds like you have a bad ground connection. A weak ground can allow some lights to function but may not pass enough current for additional functions like your brake lights. First, check the condition of the contacts on both the Blazer and the trailer connectors. Clean off any visible greenish or whitish discoloration with a spray-on contact cleaner or brush. You can also check the main ground wire on the vehicle wiring harness where it attaches to the frame and on the trailer side...
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• No Power to Trailer Connector on a 2014 Ford F-150
  I checked the owners manual online for the 2014 Ford F-150 to find all of the fuses and relays related to the tow package wiring. Under the hood in the power distribution box there are several: Relay 6 - trailer parking lamps Relay 9 - trailer battery charge Fuse 17 - brake controller Fuse 21 - power to relay 9 Relay 37 - trailer left turn and brake lights Relay 38 - trailer right turn and brake lights Relay 39 - trailer reverse lights Fuse 43 - power to relay 39 Fuse 67 - power to trailer...
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• Plugged Trailer In, there Was a Spark, Now Trailer Lights Will Not Work
  It sounds like there is a short somewhere in the trailer wiring and when it was plugged into the new trailer connector it blew the converter box, which protects the vehicle wiring from this exact situation. You can test to see if this is the problem. First, you will need a circuit tester such as # PTW2993. You will test the wires going into the converter box from the vehicle while someone sits in the vehicle and operates the lights one at a time. If the signals going into the box work,...
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• Blown Fuse & Relay with New Utility Trailer Running Lights
  One possibility is that the running lights on the new trailer are simply drawing too much current and are blowing the fuses. Trailers can be equipped with either high-efficiency LED lights or standard incandescent bulbs, which draw about 10 times the power. If the new trailer has many more running lights than the boat trailer, and/or if they are incandescent types, then they may be overloading the vehicle wiring. It is also possible that the running light wiring is pinched, has a bare...
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• Troubleshooting Trailer Blinkers that Alternate when Blinker is On
  That is an interesting problem you are experiencing. First thing you want to do is test the 4-way that is installed on the 2004 Xterra for voltage on the correct pins with a circuit tester like # 3808 like the video I attached. If the 4-way test fine then the problem is somewhere in the wiring of your trailer. Since the problem you described would be very difficult to manifest on trailer side wiring I would assume the problem is on the vehicle. The harness wouldn't most likely be the...
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• Troubleshooting a Trailer that Keeps Blowing Left Turn/Brake Lights
  It sounds like there might be a short on the left turn/brake circuit of your trailer. That would explain why the bulb went out initially and then why it went out again after you changed the bulb. I would inspect the circuit starting at the trailer connector and go all the way back to the tail light looking for corrosion or exposed wire and fix as necessary. The other thing I would check is the ground of the tail light assembly, bad grounds can cause all sorts of bizarre behavior so I would...
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• Utility Trailer Right Side Tail Light Not Working After Checking Bulb and Socket
  The first thing I would do is check to see if there is a jumper wire from the working left side tail light wire going to the right side that is not working and check that wire for voltage. You may find that the tail light jumper is damaged and will need to be repaired. If your trailer wiring has a separate tail light wire going down the right side of the trailer, check that wire for power and then for problem areas. We have a video on checking trailer lighting that should be helpful,...
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• Both Trailer Turn Signals Blink and Brake Lights Not Working with 2003 Ford F-150
  On a trailer connector in the USA the brake lights and turn signals are combined on the same circuits; one for the left and one for the right. When both of the turn signals blink that indicates that either both circuits are connected to one circuit on the vehicle side or there is a ground problem. On the vehicle side connector use a circuit tester such as # PTW2993 to determine if the vehicle side functions are correct. You should have 1 circuit for running/taillights, 1 circuit for left...
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• Troubleshooting Trailer Stop/Turn Signals that Work Intermittently
  Sounds like a ground problem on the trailer. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these...
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• Troubleshooting Turn Signals Not Working with Running Lights On on a Utility Trailer
  First, check the trailer wiring harness on your tow vehicle with a circuit tester, like part # PTW2993, and make sure all of the functions are working correctly without the trailer connected. Make sure to test with the running lights on and off to be sure. If it is not working correctly, you will most likely have to replace the taillight converter. If it is working correctly, turn your attention to the trailer. It does sound like a weak ground, or a short circuit issue, because when you...
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• Troubleshooting Malfunctioning Trailer Lights On a 4 x 6 Utility Trailer
  T-One harnesses are almost impossible to wire incorrectly, so I would say it is most likely somewhere in the trailer wiring. Whichever side, driver or passenger, is having trouble, start at that tail light and work your way towards the vehicle. If the light has a ground wire, make sure it has a good clean ground connection, and make sure it is touching metal and not paint. Some lights are grounded by the bolts or screws that attach the light to the frame, so make sure those are clean...
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• Why Does Trailer Wiring for 2001 Dodge Caravan Require Converter Box
  The reason your 2001 Dodge Caravan needs a taillight converter is because it has it's stop light circuit and blinker circuit on separate wires whereas standard trailer wiring has these two circuits combined. So this harness # 118376 combines the circuits like needed and also installs easily on your vehicle since it plugs inline with the factory vehicle wiring.
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• Low Voltage on Left Turn Signal to Trailer Plug on my 1999 Jeep Cherokee Sport
  It sounds like one of two things. Either you have a draw somewhere along the way that is taking power away from the circuit or the actual circuit isn't sending the right amount. If you use LCD Digital Circuit Tester part # PTW2992 you can test for this. Start just past the fuse for that signal if it is low there the problem or draw is in the fuse panel there if it is still at 12 volts there then work your way down the wire until you find the drop. At that point inspect the wire and repair...
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• Does Draw Tite Hitch 36292 Fit 2001 Dodge Caravan Sport
  Yes, the Draw Tite hitch part # 36296 is a fit for your 2001 Dodge Caravan Sport. This hitch is a fit for all models of the 2001 Dodge Caravan. For trailer wiring you then would want the part # 118376. I attached an install video for this as well. For a ball mount you would want the part # 36071, with hitch balls # 19258 for a 2 inch ball or # 19256 for a 1-7/8 inch ball.
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• What To Check When Trailer Lights Are Not Working After Connecting To A 2014 Jeep Grand Cherokee
  If you are getting power to everything on the vehicle side, you will need to check a few things on the trailer. First and foremost will be the grounds. This should be done for every light and if they are LED lights, each should have its own designated ground connection that is not stacked with other grounds. This is a fairly common practice, but can cause some issues and it is better for each ground to have its own connection. Next you will need to check the wires coming out of the 7 Way...
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