I just noticed that my bar across my trunklid does not light up when I
press on the brake pedal.I took a voltmeter and tested the unit and the
bulbs are ok.Does anyone know where the common areas are where the wiring
might be faulty or maybe a fuse or relay problem? The backup and lights
and both left and right brakelights work fine.
My '94 SL had a similar problem which I traced to a break in the wiring
where it flexes to follow the contour of the right side trunk hinge
(accessible by lifting the felt-covered trunk lid covering).
If you are not getting voltage (or the ground) to the light bar, you may
want to use a needle probe and voltage checker to locate the break Start at
the connector in the harness (using a normal probe), and if the power/ground
is okay there, use the needle probe to determine the precise location.
Use heat-shrink tubing to insulate and protect any repairs you make.
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