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1988 Cadillac EL Dorado POWER ABS BRAKES

Tiny
RUDDYMEN
  • MEMBER
  • 1988 CADILLAC ELDORADO
  • 4.5L
  • V8
  • FWD
  • AUTOMATIC
  • 174,000 MILES
THE VACUME PUMP ON MASTER CYCLINDER WONT RUN. TESTED PUMP WITH 12 V. CURRENT AND IT RUNS. WHAT CONTROLS THE ABS PUMP THE ECM. NO POWER AT THE PLUG THAT GOES TO THE PUMP WHEN KEY IS ON OR CAR IS RUNNING. WOULD THE MASTERCYLIMDER RUNNING LOW ON FLUID BE THE PROBLEM I HAVE ALLREADY BLED THE BRAKES AND FIXED THE LEAKS.
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Wednesday, January 22nd, 2014 AT 3:03 AM

4 Replies

Tiny
DOCDTC
  • MECHANIC
  • 53 POSTS
HI,
From the information I am able to access, Your brake booster should be run just by manifold vacuum. Are you speaking of the ABS pump? It is run by the EBCM - electronic brake control module.
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Wednesday, January 22nd, 2014 AT 5:03 AM
Tiny
RUDDYMEN
  • MEMBER
  • 9 POSTS
Yes the abs pump.
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Wednesday, January 22nd, 2014 AT 5:59 AM
Tiny
DOCDTC
  • MECHANIC
  • 53 POSTS
The ABS pump will only run when the ABS system is in active mode, ie, during a stop when it senses lockup on one or more wheels. There should be current on the feed line, it is fed by the ABS relay. If you would like I can send you the wiring schematic for the system
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Wednesday, January 22nd, 2014 AT 9:42 AM
Tiny
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  • MEMBER
  • 9 POSTS
Please send schamatic
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Wednesday, January 22nd, 2014 AT 9:54 AM

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