Lumbar controls issue - tech help?
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Joined: Feb 2007
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From: Noblesville In
Lumbar controls issue - tech help?
I tried to find a thread on this, but I did not see one with this particular issue. I also posted this in the General Section and got zero replies. Please comment if you can.
The lumbar controls normaly inflate and deflate when the buttons are pressed with the sound of the compressor operating. The compressor sound also is heard when deflating the bladders and apparently forces the air out. Trouble is, the inflate buttons work fine, but when deflating, nothing happens. No compressor noise or deflating. If I press on the bladders, while holding the button in the deflate direction, the bladders will deflate.
I am electronically capable so I imagine a relay is not working or an wire is disconnected or broken. I have taken the seat loose enough to see everything under the seat, but can not locate the problem.
Does anyone have a schematic or interconnection diagram or any knowledge on the subject I can use to track down the problem.
Thanks for any help you can provide
The lumbar controls normaly inflate and deflate when the buttons are pressed with the sound of the compressor operating. The compressor sound also is heard when deflating the bladders and apparently forces the air out. Trouble is, the inflate buttons work fine, but when deflating, nothing happens. No compressor noise or deflating. If I press on the bladders, while holding the button in the deflate direction, the bladders will deflate.
I am electronically capable so I imagine a relay is not working or an wire is disconnected or broken. I have taken the seat loose enough to see everything under the seat, but can not locate the problem.
Does anyone have a schematic or interconnection diagram or any knowledge on the subject I can use to track down the problem.
Thanks for any help you can provide
Racer
Joined: Sep 2007
Posts: 251
Likes: 0
From: Las Vegas Nv
I am having the same problem,but dont know what the problem is either
Mine work sometimes and sometimes they don't.I'm going to pull the seats and look,but I'm sure what I am looking for
If you find the problem LMK Thanks Joel
Mine work sometimes and sometimes they don't.I'm going to pull the seats and look,but I'm sure what I am looking for If you find the problem LMK Thanks Joel
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Have to say thats a new problem. I've heard plenty where the motor quits or the bladders/pipework leak. To have the problem on just deflation is a new issue to me. From a quick look it would seem that the snag has to be within the seat pump. Is fuse #3 good, although that seems to control both inflation and deflation?
Heres the schematic. BTW, I managed to chop off the ground. It grounds at G205. Post up and let us know how it goes.
Heres the schematic. BTW, I managed to chop off the ground. It grounds at G205. Post up and let us know how it goes.
Last edited by DeeGee; Jan 12, 2008 at 04:27 PM.
Instructor
Joined: Mar 2005
Posts: 104
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From: iowa
I was also having lumbar support issues on my 2000. The motor was running with no results. After pulling seat and pump ive discovered the motor/pump itself is bad. A new one at GM is $485. Anyone know where else to look for one? Used is fine with me. Thanks
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Gene Culley at GM Parts House
or
Bob at Fichtner Chevrolet
The links are down the left of the Board
