Join Date: Mar 2002
Location: Austin, TX, USA
GM did something a bit strange on the first gen electrical systems. The IGN and ACC circuits are shorted together with a resistance wire. I think this was to keep the charging system operational if the GEN bulb burned out. But this is why the light illuminates dimly in the ACC position. The resistance wire is brown with a white stripe. It is connected to ignition switch and fuse block (if I recall). The wire is about 4 feet long and taped to the harness, so it runs down the harness, doubles back and reconnects. Very strange.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI