I have a 2007 National Pacifica and wish to add a electric brake modulator for the trailer I pull. Thus far I cannot identify the proper wires under the dash to connect to.
I have a 7 pin plug on the coach and am good with electric issues. There is a harness not connected to anything under the dash but no "blue" wire so it just doesn't look right.
Any ideas?
Prefer to do it myself.
Thanks,
Jerry