Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi my name is Jake.The power mirrors do not work with the switch on the drivers door, but tilt down in reverse. Correct?Also are you familiar with a test light and/or multimeter?
Are these heated mirrors? The schematics are different.
First we need to verify a test lamp illuminates between the B+ circuit terminal 4 (red/violet) and ground terminal 5 (black wire). These are for the connector on the mirror switch. You may have to remove the drivers door panel to access it. If it does not light up we need to verify terminal 4 with a body ground then separately terminal 5 to battery positive. If those pass I believe we are looking at a faulty mirror switch.
The fuse you are looking for is #55 7.5 amp fuse labeled MIR_EWL_FR in the underhood fuse block. I have sent a diagram as well to hopefully make it a bit easier to check.
If the fuse block has a diagram on it - I would use that one as some models have different options and fuse locations but I believe this is the one you are looking for!
Okay. Just to let you know I think that is the only power source for the mirrors and they do tilt down when in reverse so I think that would eliminate a bad fuse. But it never hurts to check.