Anti lock brakes working all the time and brakes not working properly
Faulty ABS sensor in the front wheel hub. Inspect the ABS sensor in the front wheel hub, your going to have one in each side so inspect both of them. Common for the sensors to pick up dirt giving faulty signal or no signal at all giving the impression that the wheels are not moving.
Start with the simple and inspect the ABS sensor and wire leads. Replace any worn or damaged parts.
Thank you for using fixya and be safe, you can for the time being. Remove your ABS fuse to keep the ABS from working so you have 100% brake control.
Common to have build up of rust on the sensor, which once removed should fixed the issue.
#PIT3707: Information on the Upcoming Safety Recall 05068 Front Wheel Speed Sensor Corrosion - keywords ABS activation brake campaign sensor speed unwanted - (Sep 1, 2005)
1999-2002 Chevrolet Avalanche, Silverado, Suburban and Tahoe
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
These vehicles may experience unwanted antilock brake system (ABS) activation and increased stopping distances during low-speed brake applications (greater than 3.7 mph but less than 10 mph). This condition does not set any ABS codes nor does it illuminate the ABS warning lamp. This condition is more likely to occur in environmentally corrosive areas, based on field report data from the U. S. and Canada.
To correct this condition, dealers are to remove the wheel speed sensor and thoroughly clean the wheel speed sensor mounting surface on the bearing, apply Zinc-X (rust inhibitor) to the cleaned surface, grease the mounting surface, reinstall the wheel speed sensor, and check the peak-to-peak output voltage to ensure the wheel speed signal is within specifications. These repairs will be made at no charge to the customer.
Approximately 804,000 vehicles are involved. GM is working with its suppliers to obtain the required parts as quickly as possible. Based on the anticipated schedule, we plan to begin notifying customers about this recall in November 2005.
GMVIS information for this recall will not be available until the recall bulletin is released to dealers in November 2005.
Do not attempt any repairs until Campaign 05068 is released.
May 13, 2010 |
1999 GMC Yukon