Troubleshooting No Left Turn/Stop Signal After Trailer Wiring Install Curt C55532

Question:

Connected up great but no driver side lights....yellow wire....connected to another vehicle and all trailer lights work...maybe something in the power source to the yellow wire....tested for continuity at yellow side of 4 pin connector...no power...help please

asked by: Adam

Expert Reply:

What you will want to do is test the wires going into the box of the converter box for voltage with a circuit tester like the # PTW2993 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then test the output side of the box to see if the current is making it through the converter. If not then the problem is that the converter box has shorted itself out and would need to be replaced. If so then most likely the connectors just are seating properly so that the terminals can make a clean connection.

Before you replace it you will want to inspect the wiring of your trailer to see if you can find anything that would cause the box to short out like corrosion or cut/exposed wiring. These boxes don't usually go out unless there is a short on the trailer that takes it out.

expert reply by: Jameson C