1992 Ford F-250 ABS light and speedometer problem

Tiny
GLEN T
  • MEMBER
  • 1992 FORD F-250
  • V8
  • 4WD
  • MANUAL
  • 17,500 MILES
When you turn on ignition rear ABS light comes on as it should. After starting engine, ABS goes out but comes back on 30 seconds later and stays on. I checked sensor on rear end and plug-ins and they seem ok. Also, the speedometer fluctuated when the speed was constant, which affected the cruise control. I have bled the brakes, shoes and pads about 60%, checked vacuum booster, and checked the vacuum pump (this is a 7.3 diesel). Also, the brakes are frine and feel as if the ABS is working.
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Sunday, September 21st, 2008 AT 10:06 PM

1 Reply

Tiny
JACK42
  • MEMBER
If the speedo fluctuates it will set an ABS code, that is what the ABS comp uses to determine vehicle speed, so does the PCM for the engine and trans. Need to have the ABS system scanned for codes to see what it is seeing wrong
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Thursday, September 25th, 2008 AT 7:49 AM

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