* Faulty Crash Sensor: These sensors detect impact and trigger airbag deployment. A malfunctioning sensor can send a constant signal, keeping the light on.
* Clock Spring (Spiral Cable): This component allows the airbag system's wiring to rotate freely as the steering wheel turns. A broken wire within the clock spring is a very common cause of an illuminated airbag light.
* Airbag Control Module (ACM) Failure: The ACM is the "brain" of the system. A faulty ACM can cause various malfunctions, including a constantly lit light. This is often the most expensive repair.
* Faulty Airbag(s): A problem with the airbag itself, such as a damaged sensor or internal short, can trigger the warning light. This is less common than the other issues.
* Seatbelt Pretensioner Malfunction: These devices tighten seatbelts during a crash. A problem with a pretensioner can also activate the light.
* Wiring Issues: Damaged or corroded wiring anywhere in the SRS system can cause intermittent or constant illumination of the light. This could be due to rodents chewing wires, wear and tear, or previous repairs.
* Low Voltage: While less likely, a consistently low battery voltage can sometimes trigger the warning light.
What to Do:
1. Don't ignore it: A malfunctioning airbag system is dangerous. Driving with the light on means your airbags may not deploy in a crash.
2. Professional Diagnosis: Take your Jeep to a qualified mechanic or a dealership. Do *not* attempt to diagnose or repair the system yourself. The airbag system contains explosive components, and improper handling can be extremely dangerous. A diagnostic scan tool specific to the SRS system is needed to pinpoint the exact cause.
3. Cost Considerations: Repairs can range from relatively inexpensive (a loose connection) to very costly (replacing the ACM). Get a quote before authorizing any repairs.
In short, a constantly lit airbag light is a serious issue that requires professional attention. Don't delay getting it checked.
