Brake vacuum pump runs all the time - Saab 9-5 Bulletin Board - Saabnet.com
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Brake vacuum pump runs all the time
Posted by Paul in ABQ [Email] (more from Paul in ABQ) on Mon, 2 Mar 2009 10:17:38
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So if my brake assist vacuum pump is constantly running when the car is running there's a good chance...
A) My booster/vac lines have a leak
B) The relay to the vacuum pump is bad
I would think that there'd have to be a substantial leak in the booster as I would assume the vacuum pump would only activate when the brakes are applied.
Is there a vacuum relay of some kind that measures vacuum to the brake system?
posted by 68.35.148...
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