Troubleshooting a Curt 4-Way Harness with No Output Voltage

Published 07/18/2014

Products Featured in This Question

Curt 4-Way Flat Trailer Connector with Circuit Protected Powered Tail Light Converter

(65)

$41.70

Hook Probe Circuit Tester

(66)

$12.94

Question:

there is no power coming from the plug coming from the vehicle the inline fuse is ok

asked by: Cecil G

Expert Reply:

What you will want to do is test the wires going into the box of the Curt Wiring Harness part # C56496 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.

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.

If there isn't input voltage for the converter then the problem is the wiring of the wiring kit. You will need to check to make sure it's making a solid connection to the correct circuits.

I attached an FAQ on troubleshooting 4-way installs for you to check out as well.

expert reply by: Jameson C