Intermitant discharge
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Junior User
Joined: Feb 2004
Posts: 63
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Intermitant discharge
I have an E 350 6.9 liter.. Hree is my problem. sometimes the alt guage is slightly on the discharge side, not much just a hair. I notice when this happens the lites are somewhat dim. After about 1o or so miles it jumps to the charge side .. At this point lites would be brighter. And then again after some time it goes back to discharge. I have changed the voltage regulator and still same problem. Have checked all wires going to and from alternator ( what a pain that was) ... Is it possible the alternator is only charging now and then??? I have always thought it either charged or it didn't... Any body have any ideas on this????? 
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Possible due to heat induced open circuit internally. When it cools down it charges again till it reaches a high enough temp to break the circuit. If this is the problem it will keep getting worse till it does not charge at all.
