The light came on *because* the ABS system detected something amiss. This could be due to several reasons, even after a seemingly successful brake job:
* Faulty ABS sensor: These sensors detect wheel speed, and if one is damaged or improperly installed (even slightly misaligned), the ABS light will illuminate. This is a common cause after brake work, especially if the sensors were disturbed during the process.
* Wiring issues: Damage to the ABS sensor wiring during the brake job is also possible.
* Low brake fluid: Though less likely after a complete brake job, ensure the brake fluid level is correct.
* ABS module malfunction: Less common, but a faulty ABS module itself can trigger the light.
To resolve the ABS light:
1. Check the obvious: Ensure all brake components are correctly installed and that the brake fluid level is appropriate. Look for any damaged or disconnected wiring near the ABS sensors.
2. Scan for trouble codes: You'll need an OBD-II scanner that can read ABS codes (many cheaper scanners won't). This will pinpoint the specific problem. Auto parts stores often offer free code reading services. The code will help diagnose whether it's a sensor, wiring, or module issue.
3. Address the underlying problem: Based on the code(s), you'll need to repair or replace the faulty component(s) – typically a sensor or wiring harness.
4. Bleed the brakes: Properly bleeding the brakes after a brake job is crucial, and sometimes air in the ABS system can trigger the light. You might need a specialized ABS bleeding procedure, depending on your Blazer's system. Consult your repair manual.
DO NOT simply try to clear the code without fixing the underlying problem. Clearing the code without addressing the issue will only temporarily turn off the light, and the problem will persist. Ignoring the light is dangerous, as it means your ABS system may not function correctly in an emergency.
In short, the light isn't a simple reset; it's a diagnostic indicator. Getting a proper diagnosis is necessary to safely and correctly resolve the issue. A qualified mechanic can help if you're unsure about any step.
