Just Some Dude in Jersey
I fixed my double flash today. Mine is rewired so my fix probably would not work on a normal GT. There are two wires for each indicator behind the secret removable warning light panel. (Push up and in and this panel will pop out). A black and yellow that acts as a common ground for both indicators, and a black-white wire for the right one and a black-green for the left one. The black-white or green wires are the positive feed from the turn signal (or emergency flasher).I'm not getting a double-flash, if by that you mean two quick blinks separated by the normal time interval.
The turn signals are working fine. Only the indicator lights are screwy.
I talked to Gil this morning. His flasher kit is on the way. I'll let you know how it goes.