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How to check the brake light switch 900 1995

posted by  cips on  Mon Aug 2 17:11 CST 2010
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last visit: Mon Aug 2 17:11 CST 2010
[RELATED]

Question(s) for the Brick Wizards.


How can you check the operation of the brake light switch without removing it (ie, what are the 4 wires for - 2 each brown-yellow, 1 green-yellow and 1 white-brown). Which wires to put the meter on?
Photobucket

I'm guessing 2 go to the bulb failure relay and 2 go to the shiftlock. Anyone have a schematic?

You see I have the no brake light problem (again). I had it 5 years ago and replaced the round red relay with a KAE one. These are a lot smaller than the originals. Anyway, I have a good signal between pins 54 and 54L/54R so I'm thinking the jumper bars and solder joints on it are all good. I just cannot get the extra voltage to the fresh 1157's to light up the second filament.

Could the relay still be bad with a good signal out to 54L/R?





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