Buick Rainier Please tell me how to fix random electrical errors

Asked by May 16, 2018 at 02:41 PM about the 2006 Buick Rainier CXL AWD

Question type: Maintenance & Repair

Got it a few months ago.  2006 Buick Rainier.  It has random problems
including the "check airbag" error light in the display, radio screeching
(happened 2 times and not again), the driver's rear view mirror moving on its
own with the car off and locked (happened once and not again), and now I
think something is wrong with the security system.  The light comes on when
I lock it, but I tested it (opened it through an open window after locking): the
light blinked in the display, but no headlights or horn (even though the horn
works on the wheel).  The key fob also no longer can make it honk after
hitting lock twice, but it used to work. I checked a few fuses, and nothing
seemed to be off.  A mechanic also looked at wiring in the door and didnt
see anything wrong.

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