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Henry Retter 10-30-2009 17:15:22 208.118.201.204 735693 Report to Moderator	I have a "51 Farmall M with a Mitsubishi alternator connected to an external voltage regulator. I accidentally left the ignition on night after it wouldn"t start. Later, when I hook up the thick red wire to the alternator B+, it sparks, indicating that it"s drawing current. Could I have blown the diodes in the alternator by leaving the current on? [Reply]   [Send Email]
Henry Retter 11-01-2009 12:28:20 208.118.201.204 735970 Report to Moderator	Re: Alternator in reply to Henry Retter, 10-30-2009 17:15:22   I took the alternator to a shop and the diodes were toast, but he can fix it. Thanks all.   [Reply]   [Send Email]
Henry Retter 10-30-2009 17:31:30 208.118.201.204 735694 Report to Moderator	Re: Alternator in reply to Henry Retter, 10-30-2009 17:15:22   I forgot to mention that I also hooked up the jumper cables backwards when attempting to charge the battery. It was then that I noticed the wire leading to the alternator was getting really hot which is why I disconnected it from the alternator. After that, I noticed the wrong polarity and set the jumpers correctly. Not the dumbest thing I've ever done.   [Reply]   [No Email]
old 10-30-2009 17:43:22 4.245.10.83 735698 Report to Moderator	Re: Alternator in reply to Henry Retter, 10-30-2009 17:31:30   You fried it the moment you hooked up the jumper cables back wards no questions asked I know because yep I have done it in the past and it takes about 1/100 of a 2nd to fry and alternator if hooked up back wards.   [Reply]   [Send Email]
Red Dave 10-30-2009 17:39:42 98.235.15.235 735695 Report to Moderator	Re: Alternator in reply to Henry Retter, 10-30-2009 17:31:30   Well, leaving the ignition switch on wouldn't fry your diodes. But hooking up the battery jumper cables backwards could have.   [Reply]   [No Email]