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Old 11-17-2012, 09:00 AM   #3
Island Hopper
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Joined: Nov 2005
Location: N.V.I, B.C.
Oddometer: 4,301
When both your front and rear brakes do not trigger the brake lamp then to me it would suggest a wiring or contact issue.... I would check the wires to the lamp that sandwich between the rear fender for breaks or shorts... Like SRG mentioned, vibration has a tendency to kill bulbs and over time kill the bulb socket holder... Check the contacts on the bulb socket with a tester to see if power is getting to them when the brake is applied... On one of my 640s on tour, the brake lamp quit working because of a deformed {from vibration} bulb contact... For a temporary fix I was able to get it working again by prying it up a bit and scratching a better point of contact with a knife...
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