Troubleshooting No Trailer Brake Lights with Wiring Kit Installed on 2013 Dodge Grand Caravan

Question:

Hooked up a wiring harness and have no break lights at all...signal lights work and marker lights work on trailer. .all wires are connected and run properly and all trailer lights work on another vehichle

asked by: Tracy

Expert Reply:

If your trailer lights are working correctly with another vehicle then the wiring kit you got might need to be replaced. Reason being if the vehicle lights on your 2013 Dodge Grand Caravan are working just fine then that means the tee connectors on your wiring, like the Curt # C56331, are still transferring all of the signals correctly and the module box might be the issue.

What I recommend doing is taking a circuit tester like part # PTW2992 and testing the 4-Way connector on your Grand Caravan. If you don't get all of the correct signals (see attached) then the next step is to test each wire going into the module and then coming out of the module to see if anything changes. If it does then the module is bad and you need to get it replaced.

If that looks good then for some reason your vehicle isn't communicating with the trailer correctly and you'll want to take your rig to a shop to have them look at everything physically.

Attached is a helpful article on troubleshooting trailer wiring that you can check out.

expert reply by: Jon G