2006 buick lacrosse electrical system haywire

40

Asked by Guru9C45ZP Jul 09, 2021 at 06:58 PM about the 2006 Buick LaCrosse

Question type: Maintenance & Repair

Out of seemingly nowhere my electrical systems are all fucked up, the only
way i can start the car is by turning the key forward all the way and quickly
moving back to the first key position then going to second position and then
sometimes it will start.

When started everything that works is as follows: Windows, side mirrors,
cabin light, locks, trunk opener, pull down mirror lights, sunroof, fans and
direction of fan changer, cruise control (?), Headlights/brights, garage door
opener (?), Passenger air bag off/on indicator, brake lights, odometer, both
lighter ports, rear view mirror controls.

Everything that doesn't work is as follows: Rpm, speedometer, gas meter,
temp meter, (all go to 0 when it starts but doesn't go higher) radio, seat
warmers, hazards, ac compressor, cd player ejector, steering wheel temp
controller.

None of the Fuses are blown and it has basically a brand new battery
(refurbished from ACME)

6 Answers

40

Not sure if the ignition switch would cause all of these problems, and to give more information, the radio works after i turn off the engine but keep the key in the first position

1 people found this helpful.
40

And to clarify by first position and second position i mean ACC and ON

1 people found this helpful.
157,615

My first suspect would be the BCM (body control module). You'll need a scan tool that can communicate with the BCM to get any stored trouble codes. My second suspect would be a bad instrument cluster ground. If you recently installed an aftermarket stereo, look there first. On a side note, please don't use profanity. It's not necessary to get your point across. Thanks and I hope that helps! Jim

40

We replaced the Ignition switch and it worked for a good 2 minutes, then stalled on me and it went right back to having the same issues. Gonna take it up to the dealership and have them test the BCM to see if that is the issue

1 people found this helpful.
40

Replaced the Fuse box in the passenger side because it was corroded and that made it mess up.

1 people found this helpful.

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