I have been restoring a 1972 mustang mach 1 and am almost done exept some electrical problems. Both my front and rear turn signals use to work fine but nowthe rear lights both flash when I have the blinkers on, but the front is fine. I wiggled the wires near the fuse box and the blinkers worked properly for a short time, but then started both flashing agian. I looked around for some loose wires, but couldn't find any. Also today when I tryed to start her up the ground terminal on the battery began to spark and the wire became hot, but it did crank. Any help would be great. thanks

 

If you're wiggling wires and it stops bothfrom flashing both you have something loose or a short between the wires it bears a visual inspection just to make sure nothings "burned up". Typically, if both go off when one is selected it's in the T/S switch. Regarding the sparking at the gnd cable. take it apart and clean it, then tighten it snugly, that problem should go away.

 

Hey thanks so much for the help. Im guessing its the T/S switch because who knows how long it has been since it's been replaced.