So, when the information center told him check battery, he took his multimeter out of his back pocket and checked it on the side of the road. The voltage read 11.7 V with the engine running. It should read in the mid 14s ideally with the engine on and in the mid 12s with the engine off. Something was wrong in here. It turned out that the alternator was dead. Grand Cherokees are notorious for killing alternators, but this time it was Trasborg’s fault, not the Jeep’s.