Ok, this takes the cake. I will be really impressed if anyone has had the problem I am now having... When I start the car cold, I can drive it indefinitely, and the voltage will stay around 13. If I turn off the ignition for any length of time, and turn it on while the car is still hot, The voltage drops to nothing, and the battery light comes on. I have a motorola alternator, which I had tested by an electrician who said it works perfectly. Please advise me on where I should start to look for the problem. Joe Palatinus VIN 6808 17167