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View Full Version : '64 Cad Generator light


Nicos Elias
07-08-2016, 09:48 AM
Anybody have any insight...when I turn off the ignition and remove the key from my '64 Cadillac, the GEN light comes on & stays on after the car shuts off. I've been disconnecting the neg. battery cable as a temporary fix, but what would cause this?
Thanks

Joe Rackov
07-08-2016, 11:51 AM
Bad diode in Alternator most likely cause. You can check with an Ohmmeter with the unit removed and disassembled. Unlikely a voltage regulator problem.

John ED Renstrom
07-08-2016, 12:21 PM
a feed back problem. with Joe's response a good place to start.

Wayne Kidd
10-17-2016, 12:19 AM
Inside of the alternator is a "tri-ode". It has 3 leads on it and when one side of it goes bad causes the problem you are having.