Both Windows Stuck Down

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Mar 3, 2018 | 01:27 AM

Tninl02Z

Thread Starter

Heel & Toe

Joined: Jan 2018

Posts: 19

Likes: 3

Both Windows Stuck Down

Tonight as soon as i arrived to the track my windows stopped working. I had them down since the weather was really nice and couldnt run because i could never get them to go back up. I tried wiggling the wires in the door accordion tube and still had no luck. I ran the diagnostic and it says it has no communication to both door control modules and the seat control module. Any ideas on where to start i feel like it has to be a loose connection somewhere. I pulled the wires out from the drivers side door and checked the connection it seemed ok.

Mar 3, 2018 | 12:32 PM

Tninl02Z

Thread Starter

Heel & Toe

Joined: Jan 2018

Posts: 19

Likes: 3

Does anyone know of any connections that would tie these three modules together?

Mar 3, 2018 | 01:53 PM

rrwirsi

Melting Slicks

Joined: Nov 2014

Posts: 3,399

Likes: 1,339

From: Havre de Grace Maryland

Try the WACK method. Worked for me almost a year ago and still no further problems. Sometimes the motor just get stuck in a dead zone.

Attached Files

Window Wack Method.doc (131.5 KB, 66 views)

Mar 3, 2018 | 02:26 PM

Tninl02Z

Thread Starter

Heel & Toe

Joined: Jan 2018

Posts: 19

Likes: 3

Both motors at the same time though?

Mar 3, 2018 | 02:39 PM

rrwirsi

Melting Slicks

Joined: Nov 2014

Posts: 3,399

Likes: 1,339

From: Havre de Grace Maryland

Hey this is a over electrical engineered car that even Murphy's law scratches it head. Anything is possible on the C5 but I still love mine.

Mar 3, 2018 | 03:28 PM

RedRiderZR1

Drifting

Joined: Oct 2002

Posts: 1,773

Likes: 66

From: SoCal

Quote:

Originally Posted by Tninl02Z

There is a serial data line issue. There is a connector for the serial bus that powers those door control modules as well as the seat control module. There is a short or open there causing these symptoms. Under the passenger side kick panel, there is a fuse box and BCM under there. There are 2 connectors under there. The one with 4 wires going to it is the one that powers those exact modules you are having connection issues with. There is a shorting bar on top of the connector. It may have lost contact with the other circuits in the line. Might try to pull that shorting bar and re-connect it. There is an issue with the serial line though causing your problem.

The pic below is what they look like.

Last edited by RedRiderZR1; Mar 3, 2018 at 03:40 PM.

Mar 3, 2018 | 03:35 PM

Tninl02Z

Thread Starter

Heel & Toe

Joined: Jan 2018

Posts: 19

Likes: 3

Thank you RedRiderZR1 you hit the nail on the head. The connector somehow worked itself loose. I pushed it down and it popped right back in everything works again.

Mar 3, 2018 | 03:42 PM

RedRiderZR1

Drifting

Joined: Oct 2002

Posts: 1,773

Likes: 66

From: SoCal

Quote:

Originally Posted by Tninl02Z

Thank you RedRiderZR1 you hit the nail on the head. The connector somehow worked itself loose. I pushed it down and it popped right back in everything works again.

You're Welcome.

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Oct 3, 2020 | 04:27 PM

Leonard Boedeker Jr.

4th Gear

Joined: Sep 2020

Posts: 4

Likes: 0

From: Ca

Thank you. This sounds like my problem. will give it a try .

Oct 6, 2020 | 12:56 PM

#10

Leonard Boedeker Jr.

4th Gear

Joined: Sep 2020

Posts: 4

Likes: 0

From: Ca

No, one motor started acting up. Then the other side. sometimes they will work and sometimes not. Now neither window will go down at all. Just a click sound from the door when trying to roll it down.