Quote:
Originally Posted by Josh (PA)
My wagon has been acting like a turn signal bulb is out on my passenger side for a couple weeks now. All the bulbs look to be working, so I swapped them and the sockets from side to side and the issue remains on the right side. I hit all the contacts w/ DEOXIT and still no difference. What else could cause a turn signal fault?
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Did you check the litte fender side indicators as well as the main bulbs?
Also, are all the bulb bases the silver type with no brass mixed in? That can confuse the LCM. Speaking of confusing the LCM, it often reports an intermittent or steady fault before a bulb fault is visible by observation. My experience is that when regularly driven, the failing bulb will eventually hard fail and then you know which one it is. The LCM keeps a history and it may not have noticed you swapping the bulb or socket unless you left it that way for a while.
Do you live near anyone with a computer that can read BMW-specific fault codes (not the generic AutoZone code reader, nor the Peake and similar gizmos, but a real GT1 or similar)? That should give you a definitive answer. I have one, but that's a bit of a schlep from PA.
BTW, the cluster fault display on my car is one of the many manufacturing defects in the electronics that the factory failed to notice:
- Cell phone called BMW Assist to tell them my airbags had gone off, only at night when the car following me hit a pothole.
- Aux input pre-wire was mis-wired and didn't detect the aux cable as it should have.
- Glove compartment flashlight charger never got power.
- Cluster check control lights up the picture of the car when the driver's side back seat door is open, but doesn't light up the door ajar indicator for the door.
The first 3 are consequences of BMW hand-building a wiring harness for each individual car, with that car's options, and not performing any automated testing before installing it in the car, nor any functional testing when the car comes off the line. The last one is either a vendor manufacturing defect or a result of mis-handling during assembly. I'm waiting for something else to fail on the dash, like pixels, before I pull it and put a new LED in.