Troubleshooting Trailer Wiring that Stops Working when Vehicle Headlights are On
Question:
I have a 07 Audi A4 sedan. I first purchased the Curt 56201. In testing I found my veh has separate turn/brake/running light wires in the harness. So I returned the 56201 and got the 56146. Installed 56146 and all trailer lights brake/turns work perfect when headlights off but when headlights on just running lights work no brake/turn on the trailer. Any suggestions?
asked by: Kellen S
Expert Reply:
What you described is a classic ground issue. The problem is that the added amperage draw of the head/running lights being on for your vehicle makes the trailer taillights a bit weaker.
What you would want to is run the grounds of the light assemblies of your trailer back to the main ground harness of your trailer. I can almost guarantee that will fix the problem.
I attached a help article for you to check out as well that covers 4-way troubleshooting.
Product Page this Question was Asked From
Curt 4-Way Flat Trailer Connector with Circuit Protected Powered Tail Light Converter
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Converter
- 2 Feet Long
- Universal Fit
- 4 Flat
- CURT
more information >
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