How do you reset airbag light on 1991 Dodge Caravan?

You can't simply reset a 1991 Dodge Caravan airbag light like you might with a check engine light using a simple code reader. The airbag system in that era is significantly simpler than modern systems, but it still requires a diagnostic scan tool capable of reading airbag system codes. A generic OBD-II scanner won't work. These older systems use different protocols.

Here's what you need to do:

1. Find the Problem: The airbag light is on because there's a fault in the system. Before attempting any reset, you *must* find and fix the underlying issue. Possible causes include:

* Faulty Airbag Sensor: A sensor (crash sensor, seatbelt pretensioner sensor, etc.) might be malfunctioning or disconnected. These are usually located under the dash or in the seats.

* Wiring Issues: Corrosion, broken wires, or loose connectors in the airbag wiring harness are common problems. Inspect the wiring carefully, paying attention to connectors under the seats and the steering wheel.

* Clock Spring (Spiral Cable): This component, located behind the steering wheel, allows the airbag to deploy while still providing electrical connections for the horn and other steering wheel controls. A worn or broken clock spring is a frequent cause of airbag light issues.

* Airbag Control Module (ACM): The ACM is the "brain" of the system and can fail. This is usually the most expensive component to replace.

* Faulty Airbag(s): Though less common, the airbags themselves can occasionally malfunction, leading to the light illuminating.

2. Professional Diagnosis: Unless you're very experienced with automotive electrical systems and have the appropriate diagnostic tools (a scan tool specific to the 1991 Dodge Caravan airbag system is needed), you should take your Caravan to a qualified mechanic specializing in automotive electrical systems. Attempting repairs without proper knowledge can be dangerous.

3. Professional Reset (if needed): After the mechanic diagnoses and repairs the problem, they'll use their scan tool to clear the fault code from the airbag system's memory. This will turn off the airbag light. Simply clearing the code without fixing the underlying problem will only cause the light to return.

WARNING: Working on the airbag system is potentially dangerous. Improper handling of airbags or their components can lead to accidental deployment, causing serious injury. Leave this to a professional unless you have extensive experience and safety training.