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Re: F350 Diesel Alternator Question


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Posted by Hobo,NC on January 17, 2018 at 05:01:42 from (75.136.231.157):

In Reply to: F350 Diesel Alternator Question posted by UP Oliver on January 16, 2018 at 19:37:39:

Battery voltage increasing after shut down is a good sign the bats are good..

Pull up a wiring diagram on the net and go from there... The bat terminal on the alt feeds directly to the bat positive but has at least one splice in it. I spec the alt is feeding a relay on the fender the relay is feed direct battery voltage to one stud on the relay on that stud is were the alt ties into the battery. From that stud on the relay to the alt you will find several fusible links, two of those fusible links will have a splice were the alternator ties into them I am going to guess about a foot from the relay.I have seen the splice corroded into.

The tip off is no power on the bat stud at the alt and a good place to start... You will have to open up the wiring harness to find the open if no power at the alt and power on the bat stud/fusible links

the fusible links will be the big ones attached to the bat stud at the relay/solenoid. If that's your problem start you surgery on the relay/solenoid side to find the open..

Once you pull up a wiring diagram you will find the system is simple...


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