Originally Posted by ricklearned
That is why I plan to isolate the 12v ground system. That means running black ground wires to every spot the needs 12 volts. I will see how that goes as my build progresses.
Good luck with that. A lot stuff bolted to the body will turn the car back into a -12v ground. The speedometer housing is its ground connection and bolted to the body. Lights also are built like this, and the wipers, and the radio. I could have pulled off a non-grounded chassis, but only because the buggy body is fiberglass so bolting things to it doesn't ground them. I have ground wires collecting at a stud on the frame at one point up front and another in back.