Disconnect the POSITIVE battery cable and touch it to the negative terminal OR disconnect the POSITIVE battery cable for about 30 minutes (either way drains the capacitors in the electrical system)
A person can rest the check engine light on a Jeep Wrangler by disconnecting the battery. This will also rest other warning lights on the dash.
reset service engine light
A 2002 Jeep Wrangler does not have a reset switch.
A reset Engine Service Light comes on when an issue comes up with in the engine. This light can be reset by a tech or by fixing the problem.
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There are a couple of ways to reset the Service Engine Soon light on a Suzuki Grand Vitara. The easiest way is to get a scan tool from your local auto parts store. Using the scan tool will reset the service engine light. Disconnecting your vehicle's battery is another way that often works to reset the Service Engine Soon light.
The service engine light has to be reset with a scanner. Disconnecting the battery will not work. The light will come back on unless you make the necessary repairs.