Troubleshooting Curt T-Connector Wiring Harness # C55369 on a 2003 Jeep Grand Cherokee

Question:

I order this kit and it worked great twice when i had to tow my motorcycle. then when i towed with an enclosed trailer it didnt work. the cab marker lights came on and off occasionally and only the right directional and right tail light worked. we tested the trailer it was fine tested my car and the led tester showed it was my car at fault. any help?

asked by: Terry H

Expert Reply:

If the enclosed trailer that you towed with your 2003 Jeep Grand Cherokee had too many lights, then it could have overloaded the converter on the Curt T-Connector Wiring Harness, part # C55369. Each incandescent taillight draws about 2 amps and side marker lights typically draw about 0.5 amps each. Most standard converters allow up to 4 amps to pass through them. A standard converter cannot have any more than 1 taillight on each side.

I would recommend using a circuit tester like the Circuit tester, part # PTW2993 and test the wires going into the converter box on the Tow Ready wiring harness with no trailer connected. If everything is functioning properly, then test the wires coming out of the converter to make sure they have the correct functions. If they do not, there is probably a problem with the internal components of the converter, and it will need to be replaced.

If you are going to be towing the enclosed trailer and it does have more lights on it, you will want to look into using the Upgraded Circuit Protected Modulite Kit, part # C59496. The # C59496 will have a maximum of 7.5 amps for each tail light. The heavy-duty converter can also be reset if you have another problem with the converter being overloaded. I am including a link to the installation instructions on the # C59496.