I have a 99 denali. The remote key phobs quit working. When I reprogram through the diagnostic connector it blows a fuse. I suspect the coil is bad on the door reciever module. Part 15323281. I have it I just can't find it. I found the inversion relay and the lighting module which seems to be ok. I'm reading the lighting module does 3 things. Lights? Fog lights and door receiver? Is this right? Maybe thats why my headlights would go off at night and on light. I unplugged the photocell on the mirror and the headlights work fine. HELP.