DadofThree
10-15-2017, 07:52 AM
I noticed yesterday that my Alternator was hot while trying to crank my car. What is this a sign of? It's not normal is it.
https://farm5.staticflickr.com/4489/37442946080_4656c4b8f7_c.jpg
Jeff Kleiner
10-15-2017, 08:38 AM
Notwithstanding a wiring error a warm alternator when not running is typically indicative of a bad diode in the internal rectifier bridge.
Jeff
PS---Please disconnect the battery until you have corrected the problem.
AC Bill
10-16-2017, 02:36 PM
So Jeff, you mention "not running", but would that also happen when the ignition is just turned on?
I have heard of certain older Ford alternators shorting internally, even when the car was parked, ignition off. There was a serious potential for a fire, if there was no fuse used.
CDXXVII
10-16-2017, 03:08 PM
If I have the ignition on without the engine running the alternator will get warm after a few minutes.