Troubleshooting Left Turn Signal Staying Hot on a 2013 GMC 3500HD Towing a Trailer
Question:
I have a dual axle 6 x 14 trailer with electric brakes Texas Bragg When i connect my plug into the socket on the truck- The left side trailer light illuminates and just stays bright and wont function properly like the right side. I used a 7 way tester and it lit up LT The truck is a 2013 gmc 3500hd - which has done this same thing a few times before. My question- does the LTinch mean the light on the Left side of the trailer needs to be replaced? Or does it mean something else? Thanks
asked by: Joseph S
Expert Reply:
If you used a 7-way circuit tester like our 7 Way Trailer Connector Vehicle Tester # C73NR and the LT circuit stayed lit that would indicate that there is voltage on this circuit at all times which means something is shorting out onto this circuit. Due to the fact that it is hot all the time it would seem that it is the 12 volt power circuit that is shorting to the left turn/brake circuit.
I suspect you have a 7-way round connector since on these style connector the left turn and 12 volt power circuits are right next to each other. I would check the connector for corrosion or anything else that could cause a short and fix as necessary.
Products Referenced in This Question
Curt 7-Way to RV Socket LED Circuit Tester - Vehicle End
- Electrical Tools
- Testers
- Circuit Tester
- Tow Function Tester
- CURT
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Product Page this Question was Asked From
Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps
- Trailer Wiring
- Wiring Adapters
- Multi-Function Adapter
- 4 Flat
- Plug and Lead
- 4 Flat
- 7 Round - Blade
- CURT
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