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Posted by David Sherman on Friday, March 20, 2009 at 12:23:02 :
In Reply to: Re: Bob Stopka Was Right.! posted by Dave Horvath on Friday, March 20, 2009 at 07:47:09 :
You check the lead to the brake lights. This is the trail you've been on all along, and you're almost done. The fact that the wire upstream of the brake light switch was in bad shape is a pretty good clue that the downstream one is too. Better figure on just running some new wire. When you pull out the old to run the new, you'll find the problem. It's possible, and I'd say pretty likely, that the short is where the wire goes into the tail light housing. That's where the wire flexes, and if the rubber grommet is bad, which it undoubtedly is, that's an easy place for a short.
Once any bit of wiring on any vehicle is cracked and deteriorated from old age, you can pretty well figure it all is. You might find a good bit here or there in a protected place, but whatever it is that made the rubber or cloth insulation go bad in one place (age, ozone, weather, heat) is going to affect all of it to a greater or lesser degree.