[DML] Re: Hot start Voltage problem

[Sandro John Di Giacomo <sandro@xxxx>]

A few years ago I had an '85 Toyota Tercel 4WD with the exact same
problem...tested the alternator, it was fine, all the fuses were OK, we
couldn't figure out what the heck the problem was. In addition to the
battery light coming on, I had to constantly give it gas or it would stall
(maybe this goes without saying, I dunno). I also had a similar problem
in my '81 Mercedes 240D, which turned out to be something wrong with the
diodes in the voltage regulator (someone say something if this isn't
making sense, I'm going off a shaky memory at this point). I 
think when the voltage hits a certain point, they switch on and shunt the
excess to ground, and these were stuck somehow in the "shunt" position, so
no significant voltage could be established in the circut. Nevertheless,
both times a new alternator was in order, and the problems went away. I
hope this helps.




--Sandro

On Tue, 29 Feb 2000, Joe Palatinus wrote:

> 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
> 
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