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05-23-2012
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#1 |
 Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,335
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Lumbar pump
Doing a search, all I seem to find is repair it with a rubber glove. Don't know if the diaphram is torn or not, but all the pump does is go "thunk-thunk". I would think if the diaphram were torn it would run but not pump. Mine doesn't seem to even run.
Thanks for any help. Steve |
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05-23-2012
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#2 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Lumbar pump
Correct, the pumps with the bad diaphragm will run but not build any pressure.
The 94+ seats used a different style pump from the 90-93, just so you know. Not sure what year your car is. I'd suggest pulling the lower seat cushion, to see if you've got voltage at the connector for the pump when you hit the switch. If so, then perhaps the motor of the pump is bad.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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05-23-2012
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#3 |
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Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,335
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Re: Lumbar pump
Thanks Vettemed, the car is a 1990. I should have mentioned that, I saw looking through posts that they were different. No easy place to check voltage, but it pulls about 2 amps when I hit the switch and goes thunk.
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05-23-2012
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#4 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Lumbar pump
can't you disconnect the harness where it plugs into the pump and measure voltage at the connector terminals?
If it's the pump going "thunk" and not a relay, then it sounds like a bad motor to me.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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05-23-2012
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#5 |
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Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,335
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Re: Lumbar pump
And just where might I find a new motor these days?
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05-23-2012
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#6 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Lumbar pump
probably not gonna find new, used will be your best bet I suspect.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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05-23-2012
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#7 | |
 Join Date: Dec 2003
Posts: 472
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Re: Lumbar pump
Quote:
George |
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05-24-2012
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#8 |
Join Date: Apr 2006
Location: Ideho
Posts: 2,653
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Re: Lumbar pump
If you haven't opened the motor up, I would suggest doing that before looking for a new one. When I fixed mine, the diaphram was hung up inside. I had to free the motor thingee from it and then the motor worked. maybe your motor has encountered the same problem.
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[I][FONT=Comic Sans MS]John Boyd[/FONT][/I] [I][FONT=Comic Sans MS][SIZE=1]Ideho[/SIZE][/FONT][/I] [FONT=Comic Sans MS][SIZE=1][I]2015 ZL1 [/I][I]Camaro #1121 BLACK/BLACK 6 SPD (540 RWHP)[/I][/SIZE][/FONT] [I][FONT=Comic Sans MS][SIZE=1]1991 ZR-1 #458 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK 72[/COLOR]k miles ([B][COLOR=red]SOLD[/COLOR][/B]) 1991 ZR-1 #473 [COLOR=red]RED/[/COLOR][COLOR=black]BLACK [/COLOR]37k miles ([B][COLOR=red]SOLD[/COLOR][/B])[/SIZE][/FONT][/I] |
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05-24-2012
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#9 | |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,150
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Re: Lumbar pump
Quote:
I know I had a few pumps at one time, I am not sure I have any extras, but I bet the piece the connects the pump to the diaphragm is stuck
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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05-24-2012
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#10 |
 
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: Lumbar pump
As has been mentioned several times. These are very fixable. On a scale of difficulty from 1 - 10 I'd put this as a 2.
A "1" would be changing you oil. I too used thin inner tube to fix mine in 99. Hasn't failed again since. Others have used kitchen/bathroom cleaning gloves.
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Scott  Vett owner since 1979._It's about the car and the people |
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