470 Altenator Conversion Kit wiring - help

[nwboater45]

1989 19.5 foot Bluewater, 470, 3.7L, 165hp​

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Because I am a cheap bastard and love the challenge to create, I built my own alternator conversion kit for my 470. It actually looks pretty good (not to ghetto like others DIY I have seen). I based it off of an ?Ebay? kit and when all said and done I am into it for about $120. If there is enough interest I may post photos and the process of building it in another post. All built with common household tools.​

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Anyways I went to went to wire it up last night. I ?borrowed? a wiring diagram from one of our ?Ebay? friends and I went to double check it with the threads posted here on IBoats. Needless to say I am now confused. On my boat there are two wires (besides the two that go to the stator) that you disconnect from the voltage regulator. One is a Red wire and the other an Orange wire. The instructions from our ?EBay? friends say to simply connect both the Red and Orange wires to the new wire from the new alternator (however they are not called out as Red and Orange). Per the service manual diagram the red wire goes to the ignition and orange goes to the starter. There is another post on here (however it is for a 1978 470) that show all these wires hooked up to the starter solenoid (Red, Orange, and new alternator wire). So which one installation is correct for my model? ​

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I have attached all the diagrams and photos I could find.​

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Thanks.

View attachment alt 7 - Wiring.pdf View attachment Boat Wiring.pdf View attachment My wiring.pdf
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[Bt Doctur]

Assuming this is a GM 1 wire type, the orange wire is hooked to the alt and the red wire capped , both yellow wires from the stator cut and capped. If you follow the diagram back ,the red wire is a "sense" lead so to speak for the regulator, it is tied INTO the main red harness wire at that junction that looks like a large dot.

 

[nwboater45]

BT thanks...the more I look at the diagram I don't have a red/purple off of the regulator or slave. Both those wires are red. And since the regulator basically goes to the start along with the orange then I am not seeing the harm in connecting the alternator wire to both the red and orange. I am going to go back out tonight and trace the red off of the regulator and see where it goes.

 

[Bt Doctur]

when you unwrap the harness tape you will find 4 red wires joined together, just cap the red wire. The wires connected to the solenoid have no effect on the alt .

 

[nwboater45]

Thank you!!