* Faulty ABS sensor: These sensors monitor wheel speed and are crucial for the ABS to function correctly. A malfunctioning sensor is a very common cause.
* Worn or damaged ABS ring: This is the toothed ring on the wheel hub that the sensor reads. Damage or wear can prevent accurate speed readings.
* Low brake fluid: While not directly related to the ABS *function*, low brake fluid can trigger the light as a safety precaution.
* Faulty ABS control module (pump): This is the "brain" of the ABS system. Failure here is a more serious and expensive issue.
* Wiring issues: Damaged or corroded wiring to any of the ABS components can cause problems.
* Faulty wheel speed sensor connector: A simple and often overlooked problem.
What to do:
1. Check your brake fluid level: This is the easiest and quickest check. If it's low, add fluid (the correct type!) and see if the light goes off. If it does, you'll need to investigate why the fluid is low (a leak somewhere is likely).
2. Have the system professionally diagnosed: Because there are so many potential causes, it's best to take your Aerostar to a mechanic or auto parts store that can read the ABS diagnostic trouble codes (DTCs). This will pinpoint the exact problem, saving time and money.
3. Don't ignore the light: While your brakes will still work (but without ABS functionality), continuing to drive with a malfunctioning ABS system can lead to a more serious problem and safety compromise during emergency braking.
In short, the ABS light means you should get it checked out as soon as possible. Driving with the ABS light on means you'll lose the anti-lock functionality which can be very important in slippery conditions.
