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Alternator isn't charging, I'm stumped. 200 1988

uid 27's pic
posted by  Art Benstein on  Thu Mar 5 14:46 CST 2009
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

Hi Phil,

I notice you've said the red wire is a remote sense wire several times in different posts. Bosch does not do this. The small red wire is there to provide magnetism in the field for the stator to act against until the rotor reaches enough speed to sustain the field through a set of low current diodes. Bosch calls this a pre-excitation circuit.

The regulation is done entirely within the internal regulator with no external or remote sensing. The only form of remote sensing Bosch uses is temperature at the battery, but not on Volvo 240.

I recommend an SAE publication that took me out of the Chevy/Chrysler/Ford mindset well enough to help me with these Volvos: Automotive Electric/Electronic Systems, published by Robert Bosch GmbH. It covers starters to Motronic ECUs. A lot of fun too. Has stuff like the meaning of all those relay terminal numbers.
--
Art Benstein near Baltimore

Bakers trade bread recipes on a knead to know basis.





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