Join Date: Mar 2002
Location: Austin, TX, USA
Check the ground from the battery to the fender. Also check the bonding strap from the subframe to the fender on the passenger side. Sounds like your lights and radio are sharing a ground which they should not - except for the 12" or so of wire between the negative cable and fender.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI