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Originally Posted by dracon79
I have a 1999 2500HD silverado 6.0L.
It has factory installed fog lights they have always worked. Glue around one of the lenses failed and water entered the housing and blew the bulb. So instead of replacing I just took out the housings and zip tied the wires up.
A year later I got new lens housings and put them in with new bulbs. But now the fog lights wont turn on. I have replaced the cargo/fog light switch and I have checked the fuse and relay in the fuse center on drivers side under hood.
Is there a fuse somewhere else I am missing I cannot understand why these are not turning on now?
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the fog lamps are controlled by the BCM ...the BCM sends a command to the fog lamp relay this then goes thru the fog lamp fuse 15a to the bulbs......most likely the bulb explosion when the water hit shorted out the feed ..damaging the relay or fuse.. use meter see if the relay has feed to coil remove relay plastic cover...
use a clear silicone sealant to completely fill the crack/seam on the lenses...this is common as the sealant used by GM is brittle and as the temps vary the lenses are not water proof.. with care this can be done with 100% no leaks...use alcohol to clean the plastic before using the sealant for a good bond.. good luck..
" make sure the black wires at the socket are connected to body ground... "