20+ Year Contributor
- Dec 12, 2001
Ok, on the way home from work tonight I was coasting in gear to a stoplight when my battery voltage all of a sudden dropped from 13.4V to 11.7V, all the gauges dimmed, and my e-brake, coolant level, and battery dummy-lights all came on at half brightness (not completely lit up, but somewhat). There was an odd wining sound coming from what seemed to be near the alternator, but I couldn't tell since I was inside the car. When I stopped and popped the hood I could not reproduce the noise, yet the system was still at only 11.7V. When I turn the car off, then put the key in the "on" position, but engine not running, the voltage is at the normal 12.3 and all lights are at full brightness. As soon as the engine is started, the guages imediately dim and the voltage goes to 11.7 again. Anyone have any insights towards this problem? Thanks in advance.