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I had a similar problem with my 1990 Toyota Corolla.
My problem was that the Alternator diodes had burned (somehow)

If the alternator works you should be able to measure about 14V
between the battery poles.

I discovered that a battery voltage of 10V was enough to drive the
car,
But not enough to start it once I turned the engine off.



//Rickard







On 3 Feb, 06:25, Crazzytown <n...@000.com> wrote:[color=blue]
> I have a 1990 Toyota Celica everything was running perfectly fine
> driving it around. One day parked it overnight and it wouldnt start
> the next day. Thought ok. Battery must be dead. Even though it was a
> brand new battery thought maybe I left a light on. Got a boost and
> drove it back to where i live and left it running for 2 hours. Drove
> it around for 10 minutes and parked it for the night. Went to start it
> again the next day and nothing. Thought I somehow left the light on
> again. Got a boost. And let it run for 2 hours.
>
> Went back to try and drive it around and the RPM's were going from
> 1200 -1400 constantly up and down. But battery seems fine when I put
> on the radio. As soon as I go to put it into reverse and press the
> brake. The battery signal comes up. Everytime i hit he breaks the
> battery light would come on. So I figure I had a problem with my
> altinator. Got a miltimeter the next day. Yet another boost and
> checked the battery. It read 15 amps. Should only be high 12's low
> 13's if it is just the charge from the boost... Correct?. So i believe
> I found it isnt my altinator. And I checked for corrosion on the
> battery. 0.0 amps on the negative and 0.1 on the positive. So good
> connections there. So I figure'd I'd let my car run for five minutes
> and see what happened. Everything seemed fine. Turned all the lights
> off and radio off in the car and left it for an hour. Went back to it
> an hour later. The car had shut off by its-self.
>
> Can anyone please lend a hand on this one? Would mean a great deal.
>
> Thank you.
>
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