04 F350 ABS issue

[fast.5]

Hi: Great forum. I have usually been able to find my answers without posting, so I hope you guys can help me out. I have a 2004 F350 dually 4x4 with a v10. The problem I am having is with the ABS firing. Under hard braking from say 30mph or any fast speed to zero and also from 5-10mph to zero at slow braking. The Abs will release the left front brake giving me a pull to the right. The abs only does this within the last 5ft of the complete stop, does not happen at any other time. I have no abs light on. I have 1yr old brakes, have removed them and cleaned the sensors. I have unpluged each sensor and the abs light activates and the problem stops happening. Plug the sensors back in and the light goes out. Hope you can help
Thanks
Mike

 

[blacksnapon]

 

[fast.5]

Hi: Would there be a restance value for the speed sensors that I could test them to see if one is bad.
Thanks
Mike

 

[blacksnapon]

Little complicated, but here goes

Check suspect sensor electrical connector.
NOTE: Use the 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.

Monitor the resistance between the suspect wheel speed sensor terminals while wiggling the electrical connector:


Sensor Resistance
Front 4,000 ohms
Rear 3,500 ohms



If the resistance is above specifications, install a new wheel speed sensor.
NOTE: Use the 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

Monitor the resistance between the suspect wheel speed sensor terminals while wiggling the electrical connector:


Sensor Resistance
Front 2000 ohms
Rear 800 ohms



If the resistance is below specifications, install a new wheel speed sensor.
NOTE: Use the 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

Monitor the resistance between the wheel speed sensor terminal and ground on the highest resistance scale of the meter while wiggling the electrical connector.
If the meter shows anything other than an open circuit, install a new wheel speed sensor.

 

[fast.5]

Thanks Blacksnapon those numbers will help.
Mike

 

[fast.5]

Hi. I tested both sides with a model 87. Driver side
682 ohms passenger side 689 ohms. Hand spun both sides and never got above 900. Does this mean both sides are bad and would I see any codes with a code reader. Thanks for the help.
Mike