Troubleshooting Trailer Wiring Kit On a 2011 Volkswagen Touareg that Blew Fuse and Stopped Working

Updated 03/31/2015 | Published 03/30/2015

Products Featured in This Question

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(98)

$98.92

Hook Probe Circuit Tester

(60)

$12.41

Question:

I purchased a C56201KIT for use with my 2011 Touareg and it worked great for about one year. I went to tow my trailer and I noticed the fuse from the battery to power the converter was blown. When I replaced the fuse I dont get any power from the flat four plug. Two questions. 1 Do you have any troubleshooting steps to follow to diagnose the problem. 2 If the unit has failed, what is the most reliable wiring converter you sell that works with a 2011 VW Touareg? Thanks for your assistance.

asked by: Tom H

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.

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.

expert reply by: Jameson C