Quote:
Originally Posted by sugarwood
2 years ago, my brake lights stopped working
I replaced one of the switches, with a cheapo $8 switch, and that fixed it.
Now, lights not working again.
Gonna replace switch and see if that solves it
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I fought with this for quite a while before I finally just broke down and put a relay into the circuit.
Thanks to a member on this list who cut a failed switch in half, it appears that they fail as they get corrosion on the itty bitty contacts inside the switch from switching the relatively high brake light current all the time.
On my previous car I put in a relay which lasted then rest of my time owning the car (10 years) while I had gone through 4 sets of switches in less than 5 years previously.
The relay I use is just a standard Bosch relay....nothing special, here is the circuit as is installed in my car. Note that I do not use the 1989 warning light system as the dual switch and cross-wiring design used by Porsche alerts you to failure of one brake hydraulic circuit - if one switch closes and the other does not, it illuminates the brake warning light.
Hope this helps
D.