Troubleshooting No Power to Trailer Distribution Panel on Newer Trailer

Published 02/11/2022

Question:

I was looking for a short in my Lance 2075 2021 Lance trailer and disconnected the three dc charging cables, +ve battery, -ve battery and +ve disconnect sw. I found the short which was caused by a faulty emergency brake away switch. I reconnected the three wires and now have no dc to the fuses. The battery is charging fine. Also no voltage now at the +ve disconnect terminal. Could you help me Thanks

asked by: Duncan M

Expert Reply:

Have you reconnected all of your wiring connections including your ground? Be sure that the ground is securely connected to a clean, bare-metal surface to ensure that it works properly. A lot of times trailer wiring issues that arise like this are a simple fix but can be tedious to find since it involves carefully inspecting all of your wiring.

If your connections look secured and clean then I recommend using a circuit tester like part # PTW2992 to check the trailer wiring at various points to see when the power drops out. This includes checking the vehicle 7-Way socket as well as the trailer 7-Way plug (either plug it into a different vehicle or apply 12V power to the various pins to see if things work).

Attached is a wiring troubleshooting helpful article that might offer some assistance in checking your wiring as well.

expert reply by: Jon G