Troubleshooting Replacement 7-Way on 2002 Dodge Van Not Powering Trailer Lights  

Question:

Expert Reply:

If you are replacing a factory 7-Way on your 2002 Dodge Van, then the Tekonsha Multi-Plug T-One # 20135 that you referenced is the correct harness. If you plugged this into the factory port under the vehicle and it's not working to power the trailer lights, then there are a couple of things you can look at.

With the new plug installed I first recommend using a circuit tester like # PTW2993 to test the light circuit pins on the 7-Way with the corresponding function powered on the van. Check to see if you are getting power at the correct pins with the lights activated. If you are then the issue is actually on the trailer side. If you aren't getting power, then there is likely a problem with the factory wiring leading up to the connector or possibly a blown fuse.

You can check the owner's manual for your Dodge Van for the locations of any fuses related to trailer wiring and check to see if any are in need of replacement. Then you will just want to try and inspect any trailer wiring you can gain access to behind the factory plug for any pinched or damaged sections that need to be repaired/replaced.

If when testing the 7-Way, you found that the issue is on the trailer side you will want to start by visually inspecting the trailer side 7-Way for any corrosion or debris that needs to be cleaned out. Then check both the main harness ground and the individual grounds from the light assemblies to make sure they are attached to a clean bare metal surface.

If you still aren't able to locate or resolve the issue, please let me know and we can continue to troubleshoot.

expert reply by: Chris R

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