Help! New (to me) '93 suburban w/ otherwise pretty unmolested
electrical system...but i just noticed the brake lights aren't working.
I've tested the pedal switch & it's good. I've checked the leads at
the tail lights w/ a test light & could not find ANY signal coming from
the brake switch. Guess I'm looking for any (or all) of the following:
1. A good wiring diagram for a '93 Suburban 1500, 4wd, etc.
2. A component locator to accompany item #1
3. Information as to how the signal from the pedal ultimately hits the
lights....via relay & through the turn signal switch, yes? If so,
where's the relay?
4. Other pointers, tips
5. (related to #4) if it's the turn signal switch that's bad, a) how
do I test it & b) what's the best way to remove it (I'm assuming the
wheel comes off & all the wiring slides up after it...yes?).
6. Comiseration, sympathy, etc. for having such an otherwise nice
truck w/ no darned brake lights!
Thanks in advance.
This may seem silly, but double-check that no fuses are blown.
Something similar happened on my K5, except I had brakes but no parking
lights. Every time I turned on the lights, the fuse popped. I had to
end up cutting the lead wire midway between the the front and rear
wheels to isolate it to the rear or front of the truck, but it wasn't a
difficult fix. It turned out that the lead wire had rubbed itself raw
over the gas tank and was grounding out there.
If it is a short, and it's in the same relative location, it might be
easier to snake a new wire up and over the tank than to pull the
harness and repair that one spot--it was in my case.
Good luck, and as always, let us know what the fix is. You never know
when someone may wander into the group with the same problem.
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