Sounds like a total rewire is in order and with a quality aftermarket
harness. Personally, I like Painless products. They sell a GM style harness
that is specifically for a truck.
I've installed, 4 of these and it is a rewarding project when finished.
WHat ever you use ....GROUND .... Ground ....Ground!
Battery to engine.... engine to frame .... frame to body .... etc etc
Also, take note of MadElectrical above..... They speak the truth on "one wire"
alternator setups vs. stock....
my 2 cents
mike
