You may have a problem with the battery or charging system. The on-board modules need 12volts to operate correctly. Your Jeep may also have a bad ground somewhere and the draw from the blower motor is affecting module performance. Lastly the blower motor itself could be on its way out and is drawing too many amps to stay running. An amp draw test would need to be performed. Please write back if you need more information. Good Luck.
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