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Wiring diagram 1982 Ski Nautique 351 Ford |
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morris2125 
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Joined: August-12-2021 Location: Iowa Status: Offline Points: 32 |
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 Topic: Wiring diagram 1982 Ski Nautique 351 FordPosted: August-15-2021 at 3:17pm |
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Hello
I have a 1982 Ski Nautique with the 351 Ford. I have an aftermarket alternator that has four wires. I am looking for a wiring diagram please. Any help would be greatly appreciated. Thanks Matt
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: August-15-2021 at 3:50pm |
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Matt,
This may help but it only shows 3 wires. I know Ken will be by who can really help. Post what alternator you purchased.  |
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KENO
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Posted: August-15-2021 at 5:23pm |
Ken can probably help, but you'll have to answer Pete's question first  Is this a PCM 351 engine or maybe a Commander 351. It would also be good to know what your old alternator was and how many wires it had hooked to it. An 82 most likely had a Prestolite with an external voltage regulator unless it was replaced at some time in the past. The regulator would be on the back of the engine near the relay/solenoid for the starter and the main breaker.
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morris2125
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Posted: August-15-2021 at 8:30pm |
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This has a Prestolite ignition, 351 PCM Ford it looks looks a Mando alternator.AC155614 M56750
I got into this project at halftime. I do not have old alt. Probably two of the wires can be combined. Thanks again, Matt
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KENO
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Posted: August-15-2021 at 8:50pm |
Take a look at the Mando pictures in the thread in the link below and see if that helps. In the picture with short wires hooked to the alternator you'll see the following. Orange is output terminal Jumper installed between output and sensing terminal Black to Ground Yellow is excitation from 12 volt source, same power that supplies the ignition and the choke Maybe the second half will be good to you If you have an external regulator as mentioned earlier, it can be removed completely, since this Mando is internally regulated
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morris2125
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Posted: August-15-2021 at 10:29pm |
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Thanks for your help. Tomorrow I will get back at the Nautique.
Matt
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KENO
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Posted: August-16-2021 at 6:01am |
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Not knowing if you had an external voltage regulator or not, you might have to be working from this early PCM wiring diagram for your boat.
The Purple wire with the Purple arrow pointing to it going to the regulator would be used to supply alternator excitation by lengthening it to go up to the alternator. The stuff circled in Orange isn't needed any more
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8122pbrainard I know Ken will be by who can really help. Post what alternator you purchased.