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94 Jimmy brake pump

Tiny
DEZIROSE
  • MEMBER
  • 1994 GMC JIMMY
  • 6 CYL
  • 4WD
  • 150,000 MILES
Yesterday I noticed a strange noise coming from my engine when I applied the brakes, I pumped the break a few times and the noise stopped but would return if I went very long without breaking. When I killed the engine a mechanical noise continued and today my battery was dead. I think the break pump continued to run all night, is that possible and if so should replacing the pump fix it or is it a problem in the lines?
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Monday, March 14th, 2011 AT 9:53 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be a problem with the ABS unit-draining battery have it checked for excessive parastic draw
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Monday, March 14th, 2011 AT 9:58 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,873 POSTS
This is actually real common on GM trucks. Replace the shorted ABS computer. That's what runs the pump and isn't turning off.
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Monday, March 14th, 2011 AT 10:18 PM

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