Lumbar support electrical problem
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09-23-2012 | 06:20 PM
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Lumbar support electrical problem
Hi!
I have a problem with the lumbar support on the left front seat (driver side).
The support is stuck at 0%, and I can't adjust it forward. I've been reading about this problem, and it seems like it is a mechanical problem in most cases, but I disassembled the back cover and inspected it, and seemed to be OK compared to the right seat. When I'm pressing the switch to move it forward, nothing happens, and when I pressing the switch to move it backwards it just makes a small clicking sound (like a relay). The switch on the right seat also makes this clicking sound when the lumbar support is at 0%, so I guess that's normal.
I've read that the motor is a DC motor (only two wires coming out of it) meaning that it reverses when the polarity is switched.
What I have tried so far is:
The wires coming out of the motor is black and "pinkish". When measuring the two "terminals" on the motors, the black wire get the + when pressing the switch to move the support backwards. I guess this would mean that the pink should get + when pressing the switch forward, but it doesn't.
The switch has 5 wires attached to it. Two going to the motor and three coming from the cars wiring harness - yellow/black, yellow, green, black and red. I think the red is constant +, but that's all I know. When pressing the switch backwards, yellow/black, yellow and green connects with the black wire on the motor, and the black wire on the switch connects with pink wire on the motor. Can somebody tell me what kind of switch this is (SPDT DPDT?), and how I can check if it's broken?
Some guy on another forum (check this link: https://www.audiforums.com/forum/b5-...t-woes-183387/ ) said that you could disconnect the wires on the motor, and run 12v directly to it and just switch the polarity until the motor moves in the "right direction". So I hooked a long wire to the + on the battery, and a short wire to the chassis near the seat. When connecting these wires to the motor, nothing happened! I didn't even get the clicking sound (yes, I tried reversing the polarity). Can this indicate that the motor is broken?
I would really appreciate some helpful tips, and I hope you would excuse my poor english, as I'm from Norway
I have a problem with the lumbar support on the left front seat (driver side).
The support is stuck at 0%, and I can't adjust it forward. I've been reading about this problem, and it seems like it is a mechanical problem in most cases, but I disassembled the back cover and inspected it, and seemed to be OK compared to the right seat. When I'm pressing the switch to move it forward, nothing happens, and when I pressing the switch to move it backwards it just makes a small clicking sound (like a relay). The switch on the right seat also makes this clicking sound when the lumbar support is at 0%, so I guess that's normal.
I've read that the motor is a DC motor (only two wires coming out of it) meaning that it reverses when the polarity is switched.
What I have tried so far is:
The wires coming out of the motor is black and "pinkish". When measuring the two "terminals" on the motors, the black wire get the + when pressing the switch to move the support backwards. I guess this would mean that the pink should get + when pressing the switch forward, but it doesn't.
The switch has 5 wires attached to it. Two going to the motor and three coming from the cars wiring harness - yellow/black, yellow, green, black and red. I think the red is constant +, but that's all I know. When pressing the switch backwards, yellow/black, yellow and green connects with the black wire on the motor, and the black wire on the switch connects with pink wire on the motor. Can somebody tell me what kind of switch this is (SPDT DPDT?), and how I can check if it's broken?
Some guy on another forum (check this link: https://www.audiforums.com/forum/b5-...t-woes-183387/ ) said that you could disconnect the wires on the motor, and run 12v directly to it and just switch the polarity until the motor moves in the "right direction". So I hooked a long wire to the + on the battery, and a short wire to the chassis near the seat. When connecting these wires to the motor, nothing happened! I didn't even get the clicking sound (yes, I tried reversing the polarity). Can this indicate that the motor is broken?
I would really appreciate some helpful tips, and I hope you would excuse my poor english, as I'm from Norway
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