* Faulty ABS Wheel Speed Sensor: These sensors monitor each wheel's speed. If one is malfunctioning (dirty, damaged, or failing), the ABS control module detects an inconsistency and illuminates the light. This is the most frequent culprit.
* Faulty ABS Control Module: This is the "brain" of the ABS system. If it's failing, it might trigger the warning light even if other components are fine. This is a more expensive repair.
* Low Brake Fluid: While it might seem unrelated, low brake fluid can sometimes trigger the ABS light because it affects the system's pressure sensors.
* Wiring Problems: Damaged, corroded, or loose wiring connecting the sensors, module, or other components can disrupt the system and illuminate the light. This is common due to age and wear.
* Faulty ABS Pump Motor: This is less common but possible. The pump is responsible for modulating brake pressure in the ABS system.
* Faulty ABS Pump Relay: This component controls the power to the ABS pump. A faulty relay can prevent the pump from working correctly.
Before you buy:
* Get it scanned: The most important step is to have the car's OBD-II system scanned using a code reader that can read ABS codes. This will pinpoint the specific problem area. Many auto parts stores will do this for free. The code will provide much more specific direction.
* Negotiate the price: Knowing that there's an ABS issue, negotiate the price accordingly. The repair cost could range from relatively inexpensive (cleaning a sensor) to quite substantial (replacing the control module).
* Consider the age: A 1995 car is quite old. While the ABS issue might be a relatively minor fix, it's a sign that other potential problems may exist. Factor this into your decision.
In short, don't dismiss the ABS light. While you might still be able to brake, the ABS feature won't function, potentially increasing stopping distances in emergency situations. Get it diagnosed before committing to the purchase.
