Next day, borrowed a mutli-meter and tested the charging system/battery. The battery registed about 12.8V at rest and slightly better than 14V with engine running (lights, radio, rear defrost on) at idle speed. Drove around for a while to heat the engine good and rechecked. This time, meter showed about 10V at idle which was very gradually dropping. Revved engine to 2000 RPM and was able to get just above 11.5V. At idle, the meter continued downward to about 9V before I cut the engine.
That's the not so short story. My question is this: I am assuming that I need a new alternator. The fact that I apparently had to get the engine hot before the voltage dropped is confusing me. Should I be looking at something else before I replace the alternator?
have the same problem?
Wednesday, July 4th, 2007 AT 9:33 PM