Troubleshooting No Power to Brakes on Trailer
Question:
Hello. For some reason I am not getting any volt reading on the trailer side for my trailer brakes. The blue wire. When I test my brake post on my 7 way plug on my truck, I get good volts. But when I plug in my trailer and test the blue wire, I don’t get any volts. Please help. Thank you.
asked by: Cody
Expert Reply:
Since you already tested your vehicle and it sounds like it checks out, the problem must be on the trailer side. I'm not sure where you tested the blue wire on your trailer so we will start there.
Using a circuit tester like the # PTW2993, check the brake output wire right after your 7-way connector. If you have power here then there is likely a short somewhere in the wiring. If you can't find and repair the short you could run new wire using # 10-1-1.
If there is no power immediately after the connector, it is a problem with your trailer connector. Check for any debris or corrosion and clean as needed. If this is not present, or there is visible damage, I would replace it with the # PK12706.
Products Referenced in This Question
Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- Plug Only
- 7 Round - Blade
- Pollak
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Product Page this Question was Asked From
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