Quote:
Originally Posted by igniter3
Yesterday I replaced all the coach interior regular light bulbs with led light bulbs and one of the light is not working when I place the led bulb inplace but, when I remove the led bulb and install the regular bulb it is working again so I check with volt meter it is showing -12.5volts instead of 12.5volts. I have to remove the light and rewiring the light that have been wiring the 12.5volts positive to the ground wire of the light fixture from the Factory.... so I believed that in some point in the motor home will not be 100% correctly done by the motor home manufacture.
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Where did you get the LED lamps? Most quality LED replacement lamps are not polarity specific (can be plugged in either way). You don't list what type bulb you are replacing (there are several types with 921 one of the most popular) so can't help other than to say remove fixture and swap the wires or buy better lamps.
Just a side note ... I've read and witnessed first hand, where some of the "economical" brand lamps can leak RF signals that can interfere or even block the television from receiving channels.