Electric air pump doesn't seem to be working

Tiny
BTSUNDY
  • MEMBER
  • 1987 CADILLAC DEVILLE
  • 115,000 MILES
1987 cadillac deville - next to battery, there's an air pump (with a charcoal filter) with a small plastic tube going through firewall that doesn't appear to work. What system does this support? I cant find it in service manual or on any electrical/system diagrams
Wednesday, November 9th, 2011 AT 7:18 PM

8 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuse and relay for this, but you may have a bad pump.
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Wednesday, November 9th, 2011 AT 8:32 PM
Tiny
BTSUNDY
  • MEMBER
  • 4 POSTS
What is the name of the pump, and what system is it? Why does air tube go through firewall, and what does it control?
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Wednesday, November 9th, 2011 AT 9:43 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It controls the air ride suspension in the rear.
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Wednesday, November 9th, 2011 AT 11:20 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
This is the level ride compressor. Does the level ride come on the dash?It has a test wire right where the harness is. Youll see a wire by the compressor not hooked to anything and maybe taped back. It has a green connector on it. Turn the key on and ground that wire. The compresser will start running. We will start here. AddReply to Question
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Thursday, November 10th, 2011 AT 2:59 AM
Tiny
NEWYORKER1970
  • MEMBER
  • 2 POSTS
I know this is old post but only link I found to my problem.
I jumped green wire. Pump runs but only when I do that.
What does that mean? What needs to be replaced?
Also I left it running and found it does pump air but guessing leak somewhere.
What can I add to line that will escape leak hole and show itself without damaging the system?
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Saturday, January 21st, 2017 AT 9:10 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you have a leak use soapy water around connections and shocks to find leak. And do as I said in first reply
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Saturday, January 21st, 2017 AT 12:25 PM
Tiny
NEWYORKER1970
  • MEMBER
  • 2 POSTS
I can hear where the leak is but have no luck stopping it.
The hose going into black canister at compressor leaks. When I remove hose and plug with finger it holds pressure. I hook up hose and I can hear air escaping. Have to create a small reservoir to hold water so I can submerge the area. Spraying it didnt work but I can easily hear it and know where it is.
The line is so small in diameter. Is there a way to cut it and put new end on it for better fit? It is a plastic air line with plastic compression fitting on end. Two small washers on backside of compression end.
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Saturday, January 21st, 2017 AT 10:30 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
They shold have them at auto parts.
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Sunday, January 22nd, 2017 AT 8:14 AM

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