When the switch is turned on all of the other lights come on: the parking lamps, tail lights, reverse lghts, intstrument and panel lights all work. the headlights will not turn on with the low or high beams on.
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The marker lamps
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The tail lamps
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The license lamp
The front marker lamps are grounded through the turn filament of the respective front park/turn lamp. The front marker lamps light as a result.
The automatic lamp control function turns on the park lamps and the headlamps. This action occurs when the ambient light sensor determines that the exterior lamps should be turned ON based on the amount of available light. When the BCM grounds the park lamp relay, voltage is supplied directly to the park lamps, bypassing the turn/headlamp switch assembly. When this action occurs, the following conditions exist:
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The automatic lamp control relay is grounded.
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The headlamps turn ON. Refer to Headlights/Daytime Running Lights (DRL) Circuit Description .
The lamps turn OFF when the BCM does not ground the park lamp relay or the automatic lamp control relay. This action is caused by the following conditions:
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The available light reaches a predetermined level.
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The ignition switch is turned to the OFF position
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it is a 92 c/k1500. the weird part was that after a period of time, probably 15-20 min, the lights were on. i had come inside and left the switch on and when i went back outside they were on.
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