1990 GMC V1500 Jimmy
ABS rear - in working condition (maybe, was until the following
incident but haven't tested it since so it may still be working who
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;
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.