rear windows don't work

Electronic systems, stereo and Holden iQ, wiring, it all goes here....
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Z09SS
Posts: 96
Joined: Thu Feb 17, 2022 10:58 am
Location: Gulf Coast Florida

Re: rear windows don't work

Post by Z09SS »

Thank you jackleg for those pictures!

For some reason I wasn't understanding what I was looking for until I found this thread!
impaladakid
Posts: 44
Joined: Sun Jan 15, 2023 3:35 pm

Re: rear windows don't work

Post by impaladakid »

Bringing this one back from the dead. Both back windows do not operate from any switch. I checked the white plug with blue wire under the passenger front seat, and it was either never unplugged from the real plug, or the previous owner plugged it back in. The false plug was still taped to the wire harness. I checked for power on either side with key on, and any window switch from the driver to the back doors. There seems to be no power with the blue wire. Not sure if it is a power wire, or a ground. Where should I look next? I am sure it is something simple...... I hope
Phantom Black 2012 9C1 L77

Past cars
2009 Pontiac G8 GT
1995 Caprice 1A2 police wagon
3 1994 caprice 9C1s
4 Buick Roadmaster Wagons
2 1995 Cadillac Fleetwoods
2 1994 Impala SS
1 1996 Impala SS
1 1996 Roadmaster sedan
1 1995 Roadmaster Sedan
1 1992 caprice 9C6
1 1991Caprice
1 1987 Grand National
1 1986 Camaro IROC 5 speed
CrashTestDummy
Posts: 2300
Joined: Sat Feb 07, 2015 2:31 pm
Location: Pearland, Texas

Re: rear windows don't work

Post by CrashTestDummy »

Did you check your SPID label for option 6N5? If you have that option, your rear windows will not work from any switch without a reprogram to disable it.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2018 Tahoe PPV (her car)
1995 DGGM Impala SS
1985 Firebird - 310 LS1 C Prepared autocross car.
1980 Bluebird Wanderlodge
And some others
Do YOU have my SPID?
JRWolff
Posts: 132
Joined: Sat Aug 10, 2019 10:15 pm
Location: East Central, PA

Re: rear windows don't work

Post by JRWolff »

I would check the wiring harness between the drivers side front door and the car body. I had the same issue with mine and there were multiple broken wires in this section. Once i replaced the harness, the rear windows worked from the drivers door switch as well as the switches in each of the rear door panels. New harness is expensive if still available. Hope this helps!

JRWolff
Twin 2012 9C1's
1991 R2500 Banks Turbo Diesel Suburban
1990 V2500 Banks Turbo Diesel Suburban
1991 GMC Syclone
1986 Buick Grand National
Jester01
Posts: 24
Joined: Sun Mar 18, 2018 7:03 pm

Re: rear windows don't work

Post by Jester01 »

Sorry to dig up this old post but has anyone with a 14 and newer head the BCM reprogrammed and what did it cost you? Thanks
JoeR
Posts: 150
Joined: Wed May 25, 2022 12:34 am
Location: Central, NC

Re: rear windows don't work

Post by JoeR »

I reprogrammed my bcm about a year ago. I did it myself with a pass thru programmer, so the cost was around $50.00. It was a little bit of a pain in the butt though. GM didn't have a working calibration available for it, so I had to set an appointment for them to make the file available for me. I don't exactly remember the process, but it wasn't easy like most GM cars are. It did work though.
Joe
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