I Have Voltage At The Truck But No Voltage At The Trailers Running Lights  

Question:

Expert Reply:

Not to worry, this is a common issue and I will be happy to help you get your running lights working again. Since you already checked the fuses and relays on your vehicle. The next step is to inspect the trailer connector for corrosion in the connector, inspect the wiring and where the harness connects to the truck wiring for any shorts.

The next step would be to check all of the grounds for a loose connection or corrosion and clean and relocate as necessary.

If the above steps do not fix the issue, I recommend using a multimeter # PT89ZR and trying to test along the running light circuit wire from the connector and up along the vehicle, looking for where the voltage drops to see if the wiring might be damaged or exposed at any point.

If you are still not able to resolve this, please let me know and I will be happy to look into this further.

expert reply by: Timothy G

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