Posted by Jon Hagen on February 18, 2017 at 19:24:15 from (64.68.4.241):
In Reply to: Alternator posted by To30man on February 18, 2017 at 14:52:14:
Is it a Delco alternator ? If it has an external regulator and has the plug 0n the alternator rear face with the terminals arranged like this, {II}, it may be a Delco DN series with external regulator. If so, the squeal sounds like a regulator problem.
Both the external regulated Delco DN and the internal regulated Delco SI have a 3 wire hookup, so both could be called 3 wire.
What is normally considered to be a 3 wire alternator is the internal regulator Delco SI series, the plug would be on the rear side edge and have the terminals arranged like this {- -}, a long narrow plug, unlike the square plug on the rear face of the external regulator Delco DN alternator.
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