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1987 Cadillac Deville air pump problems with emergency parking brake

Tiny
BTSUNDY
  • MEMBER
  • 1987 CADILLAC DEVILLE
  • 115,000 MILES
Parking brake will not disengage when shifting to reverse. There is no suction when vacuum hose is disconnected.
Tuesday, November 1st, 2011 AT 5:41 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
How about when you put it in drive? It may be the neutral saftey switch which controls this operation.

Roy
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Tuesday, November 1st, 2011 AT 5:58 PM
Tiny
BTSUNDY
  • MEMBER
  • 4 POSTS
When I shift out of park, I have to manually disengage parking brake under dash by pulling lever. Also, I'm not getting any vacuum when I take hose off EGR.
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Tuesday, November 1st, 2011 AT 6:12 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Egr has nothing to do with it.

It sounds like the vacuum switch under the dash on top of the column has failed. Get a shop to confirm and give you a bid.

Roy
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Tuesday, November 1st, 2011 AT 6:15 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Those vacuem valves where always failing. The neutral switch is on the trans by the shift cable. That is where the vacuem lines are
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Wednesday, November 2nd, 2011 AT 9:27 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
This switch is on the trans right where the shift cable hooks to the neutral switch hooks up on trans their. Youll see the vacuum hoses. Check for vacuem going through to the release valve their.
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Wednesday, November 2nd, 2011 AT 10:03 PM

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