Problems replacing interior lights with LEDs
I've started replacing my interior lights with LEDs - I've changed the main dome light to orange and the foot well lights to orange to match the dash. I figurured while i was at it, I may as well change the others, so I changed the glovebox light and the rear boot light to festoon LEDs as well.
This is where I've run into a problem.
The rear boot light won't turn off.
After all the doors are closed, it dims as usual, then stays glowing, and occasionally flickering bright enough to distract me while driving (with the rear seats down).
I put a voltmeter across the terminals, and found without a bulb, it reads:
12V : Doors open
10.5V : Doors closed
11.5V : Doors closed engine running.
When I put the incandescent bulb back in, and put the voltmeter on, it reads 0V with the doors closed.
With the LED bulb in, it reads 2V lower than the voltages above.
I guess the resistance of the LEDS is much greater than the incandescent.
It strikes me as very odd that there's such a high voltage when I would expect zero. The main dome light goes to zero, and the glovebox light is mechanically isolated, so it's not a problem.
Does anyone have an explaination, or would be able to measure the voltage across their boot light terminals (bulb removed) with the doors shut?
I wonder if I've got a wiring fault.
Last edited by damiond; May 2nd, 2006 at 11:48 PM.
Reason: more accurate title