Alternator wiring

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Hey experts

I've got a mid-80's motor (at least that was what I was told by PO) in a '77 ski nautique with apparently original wiring harness. This is the same motor that I figured out last fall (with great help from Zach!!) needed to have a ballast resistor wired in to solve a sputtering when warm issue.

- I'm getting no charge at the battery (tested with multimeter and stayed at 12.x volts) and discovered that the alternator on this motor does not have Green/Brown/Black wires coming off of it nor appears to be designed to have that configuration. It only has the Orange and a yellow wire.

- Currently the Green/Brown/Black are taped off at the alternator side

- the Yellow wire off the alternator is also not connected to anything.

I suspect that this alternator is alt+regulator combined (looks like it) and my wiring harness is designed for alternator only, with the regulator sitting on the back of the engine. 

Is there a way I can make this alternator work with my wiring harness??  Any tips on how to figure this out??

Thanks much y'all

d

View of Alternator and taped off wires:

View of regulator:

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
diggit Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: August-12-2012 Location: Minneapolis MN Status: Offline Points: 135	Post Options Post Reply Quote diggit Report Post Thanks(0) Quote Reply Topic: Alternator wiring Posted: August-03-2013 at 3:57pm
	Hey experts I've got a mid-80's motor (at least that was what I was told by PO) in a '77 ski nautique with apparently original wiring harness. This is the same motor that I figured out last fall (with great help from Zach!!) needed to have a ballast resistor wired in to solve a sputtering when warm issue. - I'm getting no charge at the battery (tested with multimeter and stayed at 12.x volts) and discovered that the alternator on this motor does not have Green/Brown/Black wires coming off of it nor appears to be designed to have that configuration. It only has the Orange and a yellow wire. - Currently the Green/Brown/Black are taped off at the alternator side - the Yellow wire off the alternator is also not connected to anything. I suspect that this alternator is alt+regulator combined (looks like it) and my wiring harness is designed for alternator only, with the regulator sitting on the back of the engine. Is there a way I can make this alternator work with my wiring harness?? Any tips on how to figure this out?? Thanks much y'all d View of Alternator and taped off wires: View of regulator:
	'93 Ski Nautique Black/Teal '77 Ski Nautique. Loved it. Let it Go.

diggit Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: August-12-2012 Location: Minneapolis MN Status: Offline Points: 135	Post Options Post Reply Quote diggit Report Post Thanks(0) Quote Reply Posted: August-03-2013 at 4:11pm
	I found this wiring diagram on the forum, which is different than the wiring diagram found in the Reference > Engine manual section. Looking at this one, it appears I could run the yellow off the alternator back to my Ballast Resistor...right? If I do that am I messing with my setup that has an ammeter (I believe) in the dash? So many questions....so many questions... sorrry. I'm not well versed on the electrical side of things yet. But getting there! :) http://www.correctcraftfan.com/forum/forum_posts.asp?TID=31014&KW=alternator+wiring&PID=402087&title=100amp-alternator-upgrade-boat-wont-start-now#402087
	'93 Ski Nautique Black/Teal '77 Ski Nautique. Loved it. Let it Go.

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: August-03-2013 at 4:30pm
	Here's the diagram:

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: August-03-2013 at 4:40pm
	This is tricky. You've got a 70's boat hull with an 80's motor and potentially a more modern alternator. Some of the newer alts are one wire only, so you have to figure out what the alternator actually is.

diggit Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: August-12-2012 Location: Minneapolis MN Status: Offline Points: 135	Post Options Post Reply Quote diggit Report Post Thanks(0) Quote Reply Posted: August-03-2013 at 5:29pm
	The alternator is a Motorola 8rg2009a
	'93 Ski Nautique Black/Teal '77 Ski Nautique. Loved it. Let it Go.

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: August-06-2013 at 6:46pm
	Did you get anywhere: I found this: http://www.jamestowndistributors.com/userportal/document.do?docId=1096 This PDF Version reads a bit better but same info: http://www.jamestowndistributors.com/userportal/pdfs/howtos/Tech_Marine_Alternator_tips.pdf The only thing I see about an alternator having a yellow, is at the end and refers to that going to an external regulator.

Dan in CT Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: November-12-2012 Location: East Hampton, C Status: Offline Points: 77	Post Options Post Reply Quote Dan in CT Report Post Thanks(0) Quote Reply Posted: August-07-2013 at 8:31am
	I'm in the process of changing my alternator. Pulled voltage regulator and exposed all the wiring. Once I get it installed and running, I'll post my results and what I did. I bought my alternator from Nautiqueparts. It was the $199 51amp replacement. They have some wiring instructions in the "other photos" of the alternator on the website.

Alternator wiring

About CCF

Donate

Partners

Contact