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RABS Light

Tiny
MSTRAWDER81
  • MEMBER
  • 1992 FORD F-150
  • 4.9L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 283,000 MILES
Just replaced the suspension and steering components. Still had a bit of a vibration. So I replaced both calipers, rotors, bearings, pads, drums, wheel cylinders, shoes and drum hardware (springs, adjusters) and bled/flushed the system. Fluid is nice and clear. Now I have more pedal travel than I should and after hitting about thirty five to forty mph, I get the yellow RABS light. If I stay under thirty mph, no light. I can stop and do not get wheel lockups, but the two symptoms only showed up after the brake job.
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Saturday, August 26th, 2017 AT 1:09 PM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
The low pedal sound like you need to adjust the shoes toward the drum a little more. As far as the ABS light there is a sensor in the rear differential housing or two sensors out by the wheels that sound like go damaged or unhooked.

Can you get under the truck and check it Im interested to see what it is.

Cheers, Ken
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Monday, August 28th, 2017 AT 4:29 PM
Tiny
MSTRAWDER81
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  • 2 POSTS
Sensor is plugged in. Doesn't appear to be damaged. No issues with shifting or speedo as I've heard is common with the sensors. Would the brakes out of adjustment cause the light? Was getting a bit of lockup last night driving in heavy rain. Pulled fuse for ABS and still got the light, but the lockup seemed to go away.
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Tuesday, August 29th, 2017 AT 10:25 AM
Tiny
KEN L
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The ABS shouldn't make the brake lock up. Do you have ABS sensors on the front wheels? If so the new rotors have the reluctors on them?
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Wednesday, August 30th, 2017 AT 10:34 AM
Tiny
MSTRAWDER81
  • MEMBER
  • 2 POSTS
No, just the single sensor on the rear axle. Going to try changing the sensor and see what happens. Just so odd it would suddenly malfunction after a brake job. Also that the light only comes on after 35mph or so.
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Wednesday, August 30th, 2017 AT 12:30 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Yep that's what sounds like has happened, please let me know if that fixes it :)
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Wednesday, August 30th, 2017 AT 4:53 PM

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