07-23-2012, 02:46 PM
Over the past two days my LS1 Trans Am has been having random ignition and battery problems. I found that the serpentine belt was sliding off of the pulleys, so I replaced the entire tensioner and tensioner pulley, as well as the serpentine belt. Last night, the interior dash lights all of a sudden got extremely dim, the "ABS Off" light came on, and the battery voltage slipped from 13 volts to about 5. After about 2 mins of driving, it returned to 13, and didn't decrease again afterward. This morning it drove fine, then did the same thing right before I needed to park the car. When I went to start it, the alternator didn't have enough power to crank over, but the starter motor was spinning away without a problem. Voltage stayed around 6 volts, and stayed there even after I jumped the car. Fast forward 5 minutes and it was the same deal, until returning to normal again. It seems to me the belt may still be slipping if the alternator isn't getting enough power to the battery, on random, but I'm not entirely sure. Any ideas on the situation?