Rewiring a trailer harness

[Rfabbi]

Does anyone know how to disconnect the power from the harness? I went to rewire thinking all the power would come from the truck but the wiring seems to be live.

[Sundancer330]

If you are talking about power in the harness on the trailer side just disconnect one of the battery terminals and that will cut all power to the trailer.

[merlinhomeauto]

Also make sure the shore power is disconnected.

[Rfabbi]

I ended up removing the Fuse to the batteries and this seemed to do the trick.