On my 95 (ATX) the wires were broken at the point where they entered the left hand trunk lid support arm, or just before. Metal fatigue due to flexing was the apparent cause. The electrical short at this point caused the licence plate lights to come on (and no back up lights) when putting the tranny in reverse . The transmission mechanic figured that out in less than a minute and zeroed in on those paticular wires.I would imagine that his clue that the switch was not the culprit was due to the licence plate lights coming on.
take a look.
