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i have a 05 grand cherokee limited 5.7, i put on a borla after market cat back exhaust and a air raid intake and it drove fine , when i decided to put on a jet module stage 2 , i did just how the instuctions said (very easy). i go to start it and nothing, im getting power but its not turning over and the info screen on the dash is now reading check gauges, service electrical brake system and service 4wd system. so i removed the module and the truck is still doing the same thing. any clues...please help.