LSS air-assist not assisting - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Oldsmobile When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-12-2010, 07:22 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2010
Location: Hamilton, Ontario
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
SBlackfoot is on a distinguished road
Default LSS air-assist not assisting

'98 Olds LSS, N/A.

Is the level switch for the rear ALC a common failure point on these cars? My car is sagging badly in the back, the compressor doesn't kick on anymore. New struts all around including new airbags, the system died before I replaced everything. Moving the switch manually does nothing, I'm getting power (two pins) and a good ground at the connector for the level switch connected to the rear control arm, and the compressor comes on if I jump it manually at that connector. I grabbed two switches at the junk yard last weekend and neither seems to work! I'd hate to blow a fortune on a brand new switch (if I can even find one) only to find out that the problem is elsewhere.

I guess this is more of a venting-post than anything else but I would appreciate any advise.
SBlackfoot is offline   Reply With Quote
Old 08-12-2010, 07:33 PM   #2
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

Very odd, the compressor comes on when you jump the switch, but the switch tests out OK? The only thing that comes to mind is test the compressor. It might be on the way out. If you jump the switch, does the back of the car level out?
Danthurs is offline   Reply With Quote
Old 08-12-2010, 08:03 PM   #3
Senior Member
True Car Nut
 
rjolly87's Avatar
 
Join Date: Jun 2003
Location: Las Cruces, NM
Posts: 6,857
Thanked 298 Times in 246 Posts
rjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant futurerjolly87 has a brilliant future
Default

You may also wish to check the fuse for the ELC. Usually there is a maxifuse for it.
rjolly87 is offline   Reply With Quote
Old 08-13-2010, 07:45 AM   #4
Junior Member
Thread Starter
 
Join Date: Aug 2010
Location: Hamilton, Ontario
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
SBlackfoot is on a distinguished road
Default

I have followed the procedure in my FSM and it points to a bad switch. The car side of the harness to the switch has power, switched (or timed) power, good ground, and I can jump the compressor from there. Both fuses check out. If I jump the compressor (pins A and B on the car side of the harness) the pump runs and the bags inflate. The two junkyard swtiches I grabbed though don't seem to work. That seems to be an awfully high failure rate although granted, they ARE junkyard parts.

Is the ALC switch a dealer item? How about the pump, is it servicable? It does seem to bleed down fairly quickly, in a couple of days.
SBlackfoot is offline   Reply With Quote
Old 08-14-2010, 07:15 PM   #5
Junior Member
Thread Starter
 
Join Date: Aug 2010
Location: Hamilton, Ontario
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
SBlackfoot is on a distinguished road
Default

It kinda looks like my pump is getting tired too. When the system is totally down I can jump the pump and pump it up, but if the pump is warm and there'* air in the system it doesn't want to kick over. Is it a good idea to open the pump to lube the cylinder and bearings or should I just replace it?
SBlackfoot is offline   Reply With Quote
Old 08-14-2010, 10:52 PM   #6
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

I would say go to the salvage yard and pull one that looks good.
Danthurs is offline   Reply With Quote
Old 08-17-2010, 07:44 PM   #7
Junior Member
Thread Starter
 
Join Date: Aug 2010
Location: Hamilton, Ontario
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
SBlackfoot is on a distinguished road
Default

Easier said than done in Southern Ontario. Everything gets rusty up here. Are pumps from Bonnevilles interchangeable with my H-body? I can't even find the OEM-style pump on Rockauto to cross-reference.
SBlackfoot is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
GMC Power Step Assist not working MonoAnt GMC/Chevrolet Truck/SUV 9 08-09-2014 08:22 AM
Air assist rear suspension 1Wildman 1992-1999 6 11-03-2009 07:58 PM
air assist shocks thunderhand 1987-1991 2 08-14-2007 10:01 PM
BRAKE! Dash Light On. Car does not turn over. Please assist. Mischievious_D 1992-1999 5 06-19-2007 02:39 PM
Coil over or air assist? 96LeSabre 1992-1999 12 06-15-2005 01:09 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:26 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.