Stop in for a cup of coffee

zkx14 said
Maybe find a better used harness from something close to start with. Even if it's not right it will be closer than a Universal. Lay them both out and compare, change as needed...

Good idea. thanks

Mattax said
OK. I was thinking it would be a help in narrowing the short, but actually not much in this case.
If it didn't show discharge when the fan, wipers and horn circus began, then the short is probaly at or near the firewall connector. But not sure that helps you much.

I don't think it works as none of the gauges moved when the key was turned

Mattax said
Mopar specific, or year and model specific? Mopar Specific

How many harnesses are you replacing? Entire Harness, all wiring in the car to be replaced.
Engine bay - which may be 1,2 or three harnesses all
Under Dash - yes
Body (rear lights, parking lights) yes

answers in red