Bulb out warning won't go away (searched)
10-25-2011, 07:14 PM
#12
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I purchased a 2001 A4 5 months ago and for those 5 months I have been fighting with the same problem. The bulb check system comes on and off randomly while stopped or driving, and with parking lights or headlights on. Its the yellow indicator, not the brake lights indicator. I have replaced every single bulb on the car twice. Once with Sylvania bulbs and the last time with dealer bulbs. I even replaced the xenon bulbs with new dealer ones. I have replaced the rear tail light bulb trays, and the 387 light control module. Nothing has solved the problem. I have gone over all the wiring dozens of times. It is driving me insane. The two wires mentioned in this post, I believe are pin 16 grey and 19 red. Do you cut them from the harness and ground the cluster or do you just tap a ground into them without cutting. Any help would be greatly appreciated. Thanks.
05-08-2012, 12:37 PM
#13
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I purchased a 2001 A4 5 months ago and for those 5 months I have been fighting with the same problem. The bulb check system comes on and off randomly while stopped or driving, and with parking lights or headlights on. Its the yellow indicator, not the brake lights indicator. I have replaced every single bulb on the car twice. Once with Sylvania bulbs and the last time with dealer bulbs. I even replaced the xenon bulbs with new dealer ones. I have replaced the rear tail light bulb trays, and the 387 light control module. Nothing has solved the problem. I have gone over all the wiring dozens of times. It is driving me insane. The two wires mentioned in this post, I believe are pin 16 grey and 19 red. Do you cut them from the harness and ground the cluster or do you just tap a ground into them without cutting. Any help would be greatly appreciated. Thanks.
08-26-2015, 12:51 PM
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Posting this for anyone that comes across this issue with no seeming cause... My issue turned out to be a cheap dual port USB plug in phone charger. The hint was I would hear my phone connect/disconnect sound and and instantly the brake light warning would come on. With two phones charging the warnings were non-stop. The charger was either generating noise or pulling too much load on that circuit. Whatever, popped in a new charger and the warnings stopped.
04-22-2016, 07:51 AM
#16
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For me, it was the lamp control module, or bulb out warning module, or lamp controller, whatever the proper name of that thing is. It is a large black module that looks like two relays fused together. That thing was shot so it kept giving the warning lights. After I swapped it, the problem went away. It should be numbered either 387 or 374.
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