Join Date: Sep 2000
Location: Washington, Michigan USA
Disconnect your battery ground cable and connect a non-powered test light between the battery ground terminal and the loose end of the ground cable - if something is drawing current, the light will be on. Start pulling fuses out of the fuse block one at a time; when the test light goes out, you've found the circuit that's shorted or grounded. Get a wiring diagram (in the Shop Manual) and start checking out everything on the circuit protected by that fuse. You can do the same thing with a multimeter.
'69 Z28 Fathom Green