Quote:
Originally Posted by TEPUI
During the last year, I've had to replace the bulb on one of my brake lights at least 5 times. One would assume there's a short-circuit somewhere but i really don't know how to diagnose it precisely. Is there an accurate way to diagnose this? I'd hate to take it to a shop where they do "trial & error", normally breaking something else that ends up being more expensive.
Is it possible that I'm using low quality bulbs? I would eventually like to switch to LEDs but I'd hate to keep burning them if the problem is actually a short-circuit.
has anyone experienced this before?
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Short? No.
Higher voltage? Yes.. Check the voltage at the bulb with the brake light on. Probably not the problem as there is no way you could favor that bulb as opposed to the other unless there is a common line between the lights. If that were the case, and you had a poor connection on the other lamp, it would could be dim and the one in question is getting a higher voltage than expected. If the brake brightness the same for both sides, then that is not happening.. could also check the wiring diagram to verify.
Intermittent (poor contact)... possible. This would amount to a stress on the bulb. You should verfiy good contact inside the socket. Visual inspection for rust, loose connector. If in doubt measure ohms from lead input to inside the socket. Both ground and voltage in.
Poor quality... chances are zero to none.
Brake light is on for extended period... could cause early failure. Its meant for higher brightness for short periods. Stuck on would cause early failure.
Wrong bulb: Maybe.. but I assume you have the right bulb in that position.
So the first thing to look for is a poor connection, maybe rust related. Also, convince yourself the light doesn't come on for extended periods. Socket problems etc.