* Disconnect the negative battery terminal: This will reset the onboard computer, including the maintenance light. However, this will also reset your radio presets and potentially other settings.
* Use a code reader/scan tool: A more sophisticated method is to use an OBD-II code reader (if your 1991 Cherokee is equipped for it, though it's unlikely to have the full OBD-II system) or a specialized scan tool for that vehicle year. These can directly reset the service light.
* Consult your owner's manual: Your owner's manual might describe a specific procedure, which could involve a combination of actions like turning the ignition on and off multiple times or using a specific sequence on the instrument panel.
Since the 1991 Jeep Cherokee is older, a simple battery disconnect is probably the easiest and most likely to work method, but remember to reconnect the terminal afterwards. If that doesn't work, you may have to take it to a mechanic to deal with the maintenance light.
