1999 Pontiac Grand Am
2.4L
ABS light comes on intermittently when driving car
Repairs done prior = Replaced front brake pads and rotors
tech = JK
question = Just wondering what would be the likely cause to make the
ABS light come on right after replacing the front pads and rotors. Is
the sensor on the caliper very sensitive and easily damaged when
replacing pads?
Any information would be helpful. Have replaced many brakes and never
ran into this problem.
JK:
Hello and welcome.
The sensors are part of the hub, and are not that sensitive, unless you had to really hammer on
the rotors to get them off. Speed sensors fail as any other component can fail. You may also
want to check the harness from the back of the sensor to the body. Pull off plastic cover, they
have been known to have the wires break inside the insulation. Just give a tug on each of the
two wires at the connector and up the harness and look to see if the wire is stretching.
To be sure it is a front sensor problem, you will need to have the system scanned for
ABS codes.
ABS basic operation.
2.4L
ABS light comes on intermittently when driving car
Repairs done prior = Replaced front brake pads and rotors
tech = JK
question = Just wondering what would be the likely cause to make the
ABS light come on right after replacing the front pads and rotors. Is
the sensor on the caliper very sensitive and easily damaged when
replacing pads?
Any information would be helpful. Have replaced many brakes and never
ran into this problem.
JK:
Hello and welcome.
The sensors are part of the hub, and are not that sensitive, unless you had to really hammer on
the rotors to get them off. Speed sensors fail as any other component can fail. You may also
want to check the harness from the back of the sensor to the body. Pull off plastic cover, they
have been known to have the wires break inside the insulation. Just give a tug on each of the
two wires at the connector and up the harness and look to see if the wire is stretching.
To be sure it is a front sensor problem, you will need to have the system scanned for
ABS codes.
ABS basic operation.
Pontiac Grand Am ABS light comes on after replacing brakes.
Other related articles:
ABS / Anti lock brake warning.
The anti-lock braking system (ABS) uses several sensors, motors, and a computer in conjunction with the normal
braking system.
The ABS regulates the brake pressure in order to reduce wheel lock-ups. Reduced wheel lock-ups improve the
driver's control of the vehicle during braking.
Improved stability and steering enable greater control of the vehicle in the case of an abrupt stop.
The ABS operation is available from 5 km/h (3 mph) to the maximum vehicle speed.
A warning light means a problem was detected, and the system needs to be scanned for codes in order find out the
area the fault is in. With the light on, ABS operation is not present, but normal braking is.
The Traction Control System is controlled by the ABS system.
The anti-lock braking system (ABS) uses several sensors, motors, and a computer in conjunction with the normal
braking system.
The ABS regulates the brake pressure in order to reduce wheel lock-ups. Reduced wheel lock-ups improve the
driver's control of the vehicle during braking.
Improved stability and steering enable greater control of the vehicle in the case of an abrupt stop.
The ABS operation is available from 5 km/h (3 mph) to the maximum vehicle speed.
A warning light means a problem was detected, and the system needs to be scanned for codes in order find out the
area the fault is in. With the light on, ABS operation is not present, but normal braking is.
The Traction Control System is controlled by the ABS system.
Comments
| 11-17-10 I have a 1999 oldsmobile bravada. I have replaced the lower ball joints, tie-rod ends on both sides, rotor on passenger side, wheel cylinder on passenger side, and front brakes. the ABS light was on before i changed the wheel cylinder and it went off. It had stayed off and worked fine for about 3wks or so. today it came on again. when i put the brake on it seems like it is not catching anything it makes a weird sound like a spring. i have bleed the brakes and checked the master cylinder which is fine it is only a few months old. I have put so much money into this truck!! please help me figure out what might be wrong. |
| Sounds like a bad ABS wheel speed sensor, or the wiring to one of the sensors. The front sensors are most common, but a scan of the computer for codes would give an indication as to what part of the system is having a problem. |
| 4-25-11 my grand an super charger 3.8 just shuts off when im driving it and take about 20 minutes to start back up when it turns off what could it be |
