After an extremely forceful application of the brakes at about 55MPH that locked up the fronts and I'm sure started to utilize the ABS in the rears, my brake light has been on steady for about 1 week. Just after the incident I stopped and tried removing the 1 wire that goes to the proportioning valve, and this does NOT turn off the light so I don't/didn't think it was a pressure thing. I thought my parking brake switch was out of alignment (lifting up on lever doesn't fix it) and just kept on driving it. I haven't checked the p-brake switch though.
This morning it started tweekin out, thought maybe it would go out (flashing on and off randomly) Then it got rythmic;
7 short 1 long 7 short 1 long etc.Turn off the truck, and put the key in "run" and it does the same thing. NOTHING has been jumpered AFAIK, so I don't have the truck in diagnostic mode - unles it shorted somewhere in the loom.
Everything seems fine in operation?? I'm in work right now so I can't consult my repair manuals.
GMC Gremlin