ABS Light

Tiny
MUSTANG63
  • 2005 FORD F-150
  • 98,000 MILES

Brakes pulsate when coming to a stop. Replaced brakes, rotors, and brake lines, code c1266 abs valve power relay circuit failure. What does this mean and where is it located.

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Wednesday, August 1st, 2012 AT 9:12 PM

12 Replies

Tiny
ASEMASTER6371
  • EXPERT
  • 25,481 POSTS

This means there is a wiring or issue with the ABS control module. Here is a wiring diagram of the system and a guide to help you do some easy testing.

https://www.2carpros.com/articles/how-to-check-wiring

If the wiring is okay and the module is proven to be bad here is a guide that will give you an idea of what you are in for when changing the unit out.

https://www.2carpros.com/articles/how-to-replace-a-abs-controller

Here is how to scan for codes for the people that don't know

https://youtu.be/rTtAnsOlZU4

(The ABS wiring diagrams and module and sensor location are below)

Please let us know what you find.

Cheers

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Wednesday, August 1st, 2012 AT 9:18 PM
Tiny
MUSTANG63
  • MEMBER

Thank you so much! I did the tests you had me do and it was the module that was out I replaced it and the problem is fixed. I love this site! Thanks 2Carpros :)

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Wednesday, August 1st, 2012 AT 9:43 PM
Tiny
2CARPROS KEN
  • ADMIN
  • 11,727 POSTS

Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken

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Thursday, November 16th, 2017 AT 12:23 PM
Tiny
CARLVW
  • 2005 FORD F-150

Brakes problem
2005 Ford F150 6 cyl Two Wheel Drive Automatic

When I brake, the left rear wheel locks up. Yellow Anti Lock Brake Light remains on on the dash. Have pulled the wheel and drum and all is good in there. Carl

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
MIKEELE
  • 2004 FORD F-150

Brakes problem
2004 Ford F150 V8 Two Wheel Drive Automatic 75000 miles

AFTER REPLACING FRONTDISCS AND PADS AND RIGHT CALIPER, BRAKES FEEL STRANGE AT FIRST SCRATCHING AND VIBRATING, THEN IT GOES AWAY, BUT THE ABS LIGHT IS GOING ON

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,419 POSTS

Chances are you bumped or damaged the ABS sensor on one of the wheels. Check the wiring to them and their condition. Also, make sure the rear backing plate behind the rotor isn't bent or rusted and touching the rotor.

Let me know what you find.
Joe

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
GREG PICKLE
  • 2004 FORD F-150

Electrical problem
2004 Ford F150 V8 Four Wheel Drive Automatic 112000 miles

when abs light comes on the truck also goes into engine failsafe mode. I had the rearend replaced and started having this problem. Is there a sensor that may cause it to do this on the rear end?

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,419 POSTS

There is a sensor at each wheel. If the light is on, have the computer scanned at a nationally recognized parts store. Most will do it for free. Then you'll know what wheel to check first or where the problem is coming from. Chances are they pinched a wire or loostened a connection to one ot the sensors at the wheels that is making contact some times and not others.

Let me know what you find.

Joe

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
TUK1
  • 2004 FORD F-150

Brakes problem
2004 Ford F150 V8 Four Wheel Drive Automatic 78,000 miles

I just replaced the rt front wheel bear assy. With ABS censer. The only previous problem was the wheel bearing. Now the ABS light comes and stays on. It did not before. I have already disconnected battery to try and reset light. It still returns. Is there any test to see if that new ABS censer is defective?

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
BMRFIXIT
  • EXPERT
  • 19,464 POSTS

Check for codes
need to use a scanner tool and NOT an OBDII reader
or use an ohm meter and check for continuity at the sensor

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Friday, November 17th, 2017 AT 11:43 AM (Merged)
Tiny
NANCER
  • 2002 FORD F-150

2002 Ford F150 V8 Two Wheel Drive Automatic 111550 miles

my breaks seem fine, yet the ABS light keeps coming on, but not all the time.
How can I repair this?

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Friday, November 17th, 2017 AT 11:44 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,419 POSTS

Chances are there is a bad connection or sensor. What you need to do is actually check the plugs at each wheel to make sure they are not corroded or damaged. If they look good, when the light is on, you need to have the computer scanned to identify where the problem is coming from.

Check that and let me know what you find.
Joe

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Friday, November 17th, 2017 AT 11:44 AM (Merged)

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