check the taillight harness connector, should be on the driver's side frame rail. they have a habit of wiggling loose.
-Bret
Here's a question for any truck electrical system experts. I have a
> 1990 GMC Suburban K-1500 with a 350 cid.
> Truck came with auxiliary halogen stoplights in the upper corner of each
> side of the rear (tailgate) window, very much an amateur installation,
> but they looked good and worked good, until....
>
> The other day when the left rear turn signal/brakelight failed.
> Neither the "auxiliary" nor the "normal" stop light is receiving power.
> The other side was fine, but I disconnected both "add-on" halogen
> stoplights (they look like driving lights, but have a red lens) as I
> discovered the wiring was hooked directly to each side of the turn
> signal/brakelight line with NO RELAY in evidence (poor engineering), and
> I never thought to check when I got it as BOTH sides worked fine! Until
> the left side quit...
>
> Now is this an easy fix? Or is going to require HOURS of laborous
> testing at the local GMC/Chevy dealer? Is there a particular place in
> the wiring I could look to effect an repair myself? Could this be a
> wheel column turn signal control problem? ll fuses seem ok, the left &
> right FRONT turn signals are fine...it's just the left rear turn
> signal/stoplight that has failed. Any help will be gratefully received.
> I can do almost any kind of shade-tree repairs, but automotive wiring > leaves me cold.
>
>
> Thanks for any responses, wisdom,
> well-meaning criticism, etc.
> -RFB
>
>
> --
> "A human being should be able to change a diaper, plan an
> invasion, butcher a hog, conn a ship, design a building, write
> a sonnet, balance accounts, build a wall, set a bone, comfort
> the dying, take orders, give orders, cooperate, act alone,
> solve equations, analyze a new problem, pitch manure, program
> a computer, cook a tasty meal, fight efficiently, die
> gallantly. Specialization is for insects." --Robert Heinlein
>
>