Alternator HELP PLEASE

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Here's a link to a thread with talk about the 1 wire and 3 wire Delco  style alternators

link

If you were to get a 3 wire of around 65 amps, you'd wire it as shown in the linked thread, your orange wire to the alternator output terminal and the excitation wire would be the 12 volt wire that right now feeds your external regulator. You find the wire going to the regulator that has 12 volts with the key in Run and extend that wire to your alternator as shown. The regulator gets removed since it's not needed.

Look at DB electrical part number 400-20012 or punch that number in on Amazon, EBAY etc. About 100 bucks.

The fuse on the output is to protect your wiring running up to the ammeter and back to the starter solenoid on the engine. It's the 10 gauge wire that's Orange that you're protecting.

There may be minor shimming involved for belt alignment.

I remember you getting your water pump all figured out, you'll have no trouble with this 

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KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11112	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Topic: Alternator HELP PLEASE Posted: July-11-2022 at 1:34pm
	Here's a link to a thread with talk about the 1 wire and 3 wire Delco style alternators link If you were to get a 3 wire of around 65 amps, you'd wire it as shown in the linked thread, your orange wire to the alternator output terminal and the excitation wire would be the 12 volt wire that right now feeds your external regulator. You find the wire going to the regulator that has 12 volts with the key in Run and extend that wire to your alternator as shown. The regulator gets removed since it's not needed. Look at DB electrical part number 400-20012 or punch that number in on Amazon, EBAY etc. About 100 bucks. The fuse on the output is to protect your wiring running up to the ammeter and back to the starter solenoid on the engine. It's the 10 gauge wire that's Orange that you're protecting. There may be minor shimming involved for belt alignment. I remember you getting your water pump all figured out, you'll have no trouble with this

Atomic Dam Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Groupie Joined: May-20-2020 Location: Texas Status: Offline Points: 89	Post Options Post Reply Quote Atomic Dam Report Post Thanks(0) Quote Reply Posted: July-11-2022 at 9:38am
	Keno, I verified output at the alternator. So I THINK i did that correctly to isolate the issue. I would be interested in more information regarding a more modern alternator. I don't want to have to do a lot changes so I would prefer to stick with the 3 wire but with decent instructions, I can do anything. There is an ammeter.
	Please support The Cystic Fibrosis Foundation OEF/OIF US Army Combat Veteran '75 Southwind 20 Escort 351W

KENO Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11112	Post Options Post Reply Quote KENO Report Post Thanks(0) Quote Reply Posted: July-09-2022 at 8:22pm
	Since that alternator is an externally regulated Prestolite have you verified that the issue is the alternator itself and not the external regulator? If you're headed to an auto electric shop bring the alternator and the regulator with you. If it's gonna cost an arm and 3 legs and take six months to get parts to fix it, there are marine alternators that are more modern, have internal regulators and are reasonably priced that will bolt in with a few small wiring changes. Lots of places sell Delco style (secret code for copies from various different countries not named the USA) single wire and 3 wire marine alternators that can be installed fairly easily How easily depends on whether you have a voltmeter on the dash (easy) or an ammeter (harder wiring job). In 75 it was most likely an ammeter. Just another avenue you could take, if you want more info on doing that just say so.

Atomic Dam Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Groupie Joined: May-20-2020 Location: Texas Status: Offline Points: 89	Post Options Post Reply Quote Atomic Dam Report Post Thanks(0) Quote Reply Posted: July-09-2022 at 7:14pm
	After searching all day, I came to that solution as well. I am just going to have that one rebuilt. Thank you Gary for pointing out the obvious. Like looking for my phone when I'm holding it in my hand.
	Please support The Cystic Fibrosis Foundation OEF/OIF US Army Combat Veteran '75 Southwind 20 Escort 351W

Gary S Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096	Post Options Post Reply Quote Gary S Report Post Thanks(0) Quote Reply Posted: July-09-2022 at 3:09pm
	Look for a starter / alternator rebuilder have them rebuild it. Side benefit is that you know it fits.
	69 Mustang HM SS 95 Nautique Super Sport

Atomic Dam Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Groupie Joined: May-20-2020 Location: Texas Status: Offline Points: 89	Post Options Post Reply Quote Atomic Dam Report Post Thanks(0) Quote Reply Posted: July-09-2022 at 2:26pm
	I have a 75 Correct Craft Southwind 20 with an Escort 351W. I have a bad alternator. Part number ALK-6220Y-1M. I cannot find one anywhere. Does someone have an alternative part number, or suggestion as to where to look please? Any help would really be appreciated.
	Please support The Cystic Fibrosis Foundation OEF/OIF US Army Combat Veteran '75 Southwind 20 Escort 351W

Alternator HELP PLEASE

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