Join Date: Mar 2002
Location: Austin, TX, USA
If you suspect a ground problem, use a Digital Volt Meter (DVM) to measure the voltage drop between your various grounds and the negative battery connection. You'll want to do this with the circuits loaded in various ways (lights on, brake depressed, etc.). In all cases you should very small voltage readings (< 0.05 volts or so). If you see higher readings you've found a bad ground. You'll probably need to extend your meter leads some way. I have about a 10' piece of wire with allegator clips on it that I use. I've also used jumper cables or an extension cord.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI