Quick Lumbar Question
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Joined: Jan 2017
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From: Greensburg PA
Quick Lumbar Question
So I'm in the process of putting new covers and foam on my seats. Figured I would also fix the lumbar that is broke on the driver's seat while I'm in there. The lumbar controls on my driver's seat only give a "one click" sound when depressed in any direction like a contact is closing. However, the pump doesn't run. Passenger seat works fine.
Question: Is the problem likely that the pump is simply bound up and needs cleaned? I've seen a thread where old grease is cleaned from the pump and relubed and everything works fine. https://www.corvetteforum.com/forums...2000-vert.html
Or is it likely that I need a new pump?
Question: Is the problem likely that the pump is simply bound up and needs cleaned? I've seen a thread where old grease is cleaned from the pump and relubed and everything works fine. https://www.corvetteforum.com/forums...2000-vert.html
Or is it likely that I need a new pump?
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Joined: Jan 2017
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From: Greensburg PA
So, I got into this last night. Pulled the pump/motor out and applied power with a DC power supply that I have. No workie, but still heard the contacts closing. Opened the pump up and removed the nylon cylinder holding the vanes. Grease looked ok, but there was a lot of it in there. Applied power to the motor again without the vanes and it worked now. So, the vane assembly was somehow binding up the motor.
I cleaned off all the grease and applied new silicon grease. Inserted back onto motor shaft and everything worked! You have to be careful on reassembly though. If the vane cylinder isn't seated fully down on the motor shaft or you over tighten the pump lid down onto the vane assembly, it will bind up the motor again. I did this once but quickly figured out the issue.
So, pump is working but I just now need to test it and the bladders in the car before I put on the new foam and cover. Got too late last night, so I'll test it when I get home from work today.
I cleaned off all the grease and applied new silicon grease. Inserted back onto motor shaft and everything worked! You have to be careful on reassembly though. If the vane cylinder isn't seated fully down on the motor shaft or you over tighten the pump lid down onto the vane assembly, it will bind up the motor again. I did this once but quickly figured out the issue.
So, pump is working but I just now need to test it and the bladders in the car before I put on the new foam and cover. Got too late last night, so I'll test it when I get home from work today.
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From: Greensburg PA
Ok, last update. Got home, hooked up the seat in the car and pump doesn't work. Still hear the contacts clicking, but the pump won't turn over. Took it out, tested it on my DC power supply and everything works great. Tightened up the connectors that attach to the motor terminals in case they weren't making good contact, connect it up in the car and no workie. Only thing I can figure is that it's not getting enough power when in the car. Maybe the wiring? Maybe a connector? I don't know.
I'm done with this though. It was a secondary objective to putting in new foam and seat covers. I doubt I would use lumbar settings anyway, so I'm just going to leave it for now. Maybe in the future if I get a bug up my **** to try again, at least I know where to start.
I'm done with this though. It was a secondary objective to putting in new foam and seat covers. I doubt I would use lumbar settings anyway, so I'm just going to leave it for now. Maybe in the future if I get a bug up my **** to try again, at least I know where to start.
Last edited by craigp40; Feb 17, 2017 at 08:10 AM.
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From: Greensburg PA
Awesome response 8Vette7!!! I love when someone gives a good technical explanation.
You've given me enough solid info to test this one more time. I didn't start putting the seat together yet, so it's not much additional work.
Question: Is the connector that you mention with pins A & K the clear one that plugs into the seat adjuster switch?
Shouldn't I also test pins on the connector between the car and the seat to ensure I'm getting good power there?
You've given me enough solid info to test this one more time. I didn't start putting the seat together yet, so it's not much additional work.
Question: Is the connector that you mention with pins A & K the clear one that plugs into the seat adjuster switch?
Shouldn't I also test pins on the connector between the car and the seat to ensure I'm getting good power there?
Last edited by craigp40; Feb 17, 2017 at 08:13 AM.
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From: Indiana
If the voltage checks out with the connector unplugged you should try to check it with the connector plugged in. You may have a poor ground or other poor connection in the circuit that gives a high voltage loss when passing the needed current, but doesn't show the voltage loss into a relatively high impedence meter.
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From: Greensburg PA
Guys, thanks for all the help. unfortunately, I did not test this before I put the seat back together. I couldn't identify which connector was represented in the picture. There was no connector that I could find that had two rows of 5 pins as depicted in the picture. Weather was going to be really nice, so I got anxious and put everything back together. Maybe in the future I'll get back into this, but I'm still not sure I would use the lumbar anyway. It would be more to just get it working like it should rather than me using it.
