Troubleshooting Four Wire Malfunction With No Brake Lights or Turn Function on One Side of Trailer

Question

Question:

What does it mean if I have running light tail lights, and left turn signal but NO right turn signal and NO break lights on either side?

asked by: Doug M

0

Expert Reply:

I can help you troubleshoot your trailer lights issue.

Sounds like you are having a grounding issue with the right trailer light. Even though the running lights work, it would be good to check the main trailer ground and the grounds for each of the tail lights and check the surface that they are mounted to on all sides. If they aren't mounted to a good clean metal surface it can cause some of the issues you are describing. If the trailer has paint, rust, or corrosion in the area you may want to sand that spot off. You may need to remount all the grounds to a different location, like the front of the trailer.

You may also want to check the wiring and make sure there are no pinched spots or areas of exposed wire causing a short. One other place to check for corrosion would be on the trailer connector itself, this could cause certain functions to work and not others.

If you continue to have issues after following these steps, I would be more than happy to continue to troubleshoot this issue with you.

expert reply by: Jackie C

0

Answer 1

The Patrick Distribution RV Kitchen Faucet - Dual Handle - Satin Nickel Finish #277-000014 has the male water inlets you mentioned to fit the female connections of the water lines in your picture. The plastic connections you see on the underside of…

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Answer 2

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Answer 3

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 4

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 5

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Answer 6

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Answer 7

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 8

Yes, we do. To add a hitch to your 2024 Toyota Grand Highlander, I recommend the Curt Trailer Hitch item #C26VV. This hitch is custom fit and bolts to your Toyota with included hardware. This is a class III hitch with a 2" receiver. It has a…

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Answer 9

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Answer 10

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Answer 11

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Answer 12

If your trailer has 7 wires running all the way back to the brakes, then yes, you can tap into the existing wiring. Each of your new brakes will have two wires for the brake magnet. One wire is for 12 volt power to the brake magnets and the other…

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