The light illuminates because a fault code has been stored in the airbag control module (ACM). To properly address the issue, you need to:
1. Diagnose the Problem: The first and most crucial step is to determine *why* the airbag light is on. This requires a diagnostic scan using an OBD-II scanner specifically designed to read airbag system codes (not all scanners can do this). Many auto parts stores will perform this service for free. The code will tell you what component or sensor is malfunctioning.
2. Repair the Fault: Once you know the code, you can identify the problem. This could be anything from a faulty sensor (seatbelt buckle switch, crash sensor, etc.), a shorted wire, a problem with the clock spring (in the steering wheel), or a malfunctioning airbag control module itself. These repairs often require specialized knowledge and tools, and should generally be performed by a qualified mechanic.
3. Clear the Code (After Repair): After the problem has been correctly diagnosed and fixed, *then* the mechanic will be able to clear the fault code from the airbag control module using their diagnostic scanner. Simply clearing the code without fixing the underlying issue will only cause the light to return.
Attempting to reset the airbag light yourself using DIY methods (like disconnecting the battery) is strongly discouraged. These methods do not diagnose or fix the problem; they merely temporarily clear the code. The light will come back on, and you'll still be driving with a potentially dangerous malfunctioning system.
In short: Take your 2002 Dodge Ram 1500 to a qualified mechanic or auto parts store for a proper diagnosis and repair. Your safety depends on it.
