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2004 Chevy Colorado Fog Lights

  • mike126
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7 months 1 week ago #82822 by mike126
2004 Chevy Colorado Fog Lights was created by mike126
My Colorado Fog lights work with the scan tool bi-direction feature, but not with switch. I suspect a bad switch. I already did the diagnosis in checking the ground to ground voltage drop, and it's good. My question is when looking at the data pids and grounding the signal wire to enable the fog lights I see that it changes from not active to active, but the fog lights relay is not turning on. Any help is much appreciated. Thank you!!!

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7 months 3 days ago - 7 months 3 days ago #83233 by ferris48
Replied by ferris48 on topic 2004 Chevy Colorado Fog Lights

My Colorado Fog lights work with the scan tool bi-direction feature, but not with switch

My understanding is when you do bi-directional commands you're skipping or bypassing the inputs to the BCM, to control the fog lamp relay. Are these BCM inputs responding correctly?

Headlamp On Switch
Headlamp Off Switch
Park Lamp Switch
Park Lamps Signal

 
Last edit: 7 months 3 days ago by ferris48. Reason: formatting

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