4 Wire Trailer Wiring Diagram Troubleshooting Running Lights Not Working

4 Wire Trailer Wiring Diagram Troubleshooting Running Lights Not Working. Finally, disconnect the ground wire and attach it to a piece of wire that runs to your car's negative After you've troubleshot the light wiring system on your trailer. When making your repairs or hooking up your trailer, you simply make sure these wires are running to the appropriate component as shown above.

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I definitely don't want If it's just one side of your trailer then it's most likely your fender light which should have a quick connect, it. All went well so far, brake lights works, both sigs.but my tail/running lights are not working? The original wiring on my boat trailer was damaged and installed incorrectly by the previous owner.

If the trailer lights work on your buddy's truck, then the trailer lights work - period.

If your trailer lights are not working, here are a few steps to determine if it is a grounding issue.

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There is a short in the wiring on my trailer that keeps blowing fuses, so that tells me it's grounding What are some ways I could troubleshoot to find where it's grounding at? If the trailer plug wiring on your vehicle or trailer is damaged or not working correctly, you can replace the connector with a Find the trailer light wiring diagram below that corresponds to your existing configuration. So the wiring Kit I purchased is not of the quick.