Well did you ever get the low beams to work? I had a similar issue when I purchased a 1987 Convertible Mustang GT except that all of the pigtails were melted together behind the headlight switch and dimmer panel switch so, non of the lights worked except the brake lights. So, I ended up doing the fog light fix, installing a new headlight fog light harness plus headlight switch pigtails, fog light pigtails, and dimmer panel pigtails. When I was done the only lights that did not work were the low beams.
So, after that I replaced the headlight fog light switch with no success. I ended up running a toggle switch that I purchased from radio shack.
All I did was splice into the two red/black wires from the multifunction switch pigtails using T-Taps. Twisted the two wire ends together and then twisted them to the wire supply from the toggle switch. (Yes, I soldered and used heat shrink)
Then I ran a wire directly from the batter positive terminal to a fuse holder and then to the toggle switch.
Then I connected an earth wire from the 30 amp toggle switch to the frame. Reconnected the battery and the lights work.
Last edited by 87GTConvertDavis; October 23rd, 2010 at 12:23 AM.