Have Jeep Questions? Ask a Jeep Repair Expert for Answers
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The red light is your security system alerting you that there is an issue with the key or SKIM module. If you don't have another gray headed key then I would first try caling a mobile locksmith to see if you have a bad key, if a new key doesn't do the trick you will most likely need a new SKIM module that is around the key cylinder.
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