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Old 02-22-2018, 04:09 PM
Walter Suiter Walter Suiter is offline
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Quick and dirty google gives a lot of info on the Delco 40DN series.

1st generation pretty much copied LN engineering with a remote rectifier box, but of course GM just had to louse that up shoveling the diodes inside the case where they couldn't cool. It made for a lot of work for ladies at Delco on Lyell Ave, where Monroe Ambulance now has their barn.

If the windings and slip rings still have integrity it is possible to build a rectifier/regulator pack that lives outside the alternator with far superior components to those that were hammered into the case.

Good info on the Antique Construction site

Before panicking, I'd crank the car up and determine the AC side of the alternator.
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