Series motor - "S" and "A" post wiring

pdad · 09-02-2018, 08:26 PM

I have an '89 Marathon 36V with solid state controller and series motor. All the electrical diagrams I am seeing have the motor connected opposite of the way mine is. The cart runs and has run since I bought it 1.5 years ago. Not understanding why it seems to work like this.

Basically my FNR "A" post is wired to the controller A2 but this is then connected to S2 on my motor (instead of A2 as diagrams show). FNR "B" post is connected to motor A1, FNR "C" post is connected to controller M-, as it should be. FNR "D" is wired to motor A2 (instead of motor S1/S2). B- on controller is connected to battery pack "-" and controller B+ is connected to solenoid.

Not understanding why cart is working when A and S connections are basically opposite of wiring diagrams. Can any help me understand why this works?

Thanks....

cgtech · 09-02-2018, 10:12 PM

More than one way to skin a cat. It can be wired several ways successfully.

JohnnieB · 09-02-2018, 11:01 PM

In the way of an explanation, it is a series circuit (IE: single current path between B- and B+), so the various components can be arranged in several different sequences and still work properly.

The purpose of the F/R switch is to change the direction of current flow through either the armature or stator windings so the motor's output shaft spins in the opposite direction when the F/R is set to F than it does with the F/R set to R.

In addition, the selector lever ought to match the direction the cart travels, so that narrows the number of proper working possibilities down to four, or at least that is my guesstimate without drawing out the various circuits on paper.

pdad · 09-03-2018, 09:48 AM

Thanks for the info guys!

Guess as long as the cart goes as and where planned, all is good :)

yurtle · 09-03-2018, 05:59 PM

Print out the diagram and label it the way you have it. That will help you figure out future problems. You'll have'em.

pdad · 09-03-2018, 08:06 PM

On an '89 - prob lots of troubles in my future. TY for the tip of labeling drawing to match mine - great idea!

yurtle · 09-04-2018, 12:19 AM

I'm an engineer. If it ain't broke, it just don't got enough features.

I'm behind on updating my diagrams in Visio, but what ain't in Visio, is on crude sketches.

09-02-2018, 08:26 PM	#1
pdad Not Yet Wild Join Date: Jul 2017 Posts: 8	Series motor - "S" and "A" post wiring I have an '89 Marathon 36V with solid state controller and series motor. All the electrical diagrams I am seeing have the motor connected opposite of the way mine is. The cart runs and has run since I bought it 1.5 years ago. Not understanding why it seems to work like this. Basically my FNR "A" post is wired to the controller A2 but this is then connected to S2 on my motor (instead of A2 as diagrams show). FNR "B" post is connected to motor A1, FNR "C" post is connected to controller M-, as it should be. FNR "D" is wired to motor A2 (instead of motor S1/S2). B- on controller is connected to battery pack "-" and controller B+ is connected to solenoid. Not understanding why cart is working when A and S connections are basically opposite of wiring diagrams. Can any help me understand why this works? Thanks....
pdad Not Yet Wild Join Date: Jul 2017 Posts: 8

09-02-2018, 10:12 PM	#2
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: Series motor - "S" and "A" post wiring More than one way to skin a cat. It can be wired several ways successfully.

09-02-2018, 11:01 PM	#3
JohnnieB Techno-Nerd Join Date: Jun 2011 Location: West Virginia Posts: 19,654	Re: Series motor - "S" and "A" post wiring In the way of an explanation, it is a series circuit (IE: single current path between B- and B+), so the various components can be arranged in several different sequences and still work properly. The purpose of the F/R switch is to change the direction of current flow through either the armature or stator windings so the motor's output shaft spins in the opposite direction when the F/R is set to F than it does with the F/R set to R. In addition, the selector lever ought to match the direction the cart travels, so that narrows the number of proper working possibilities down to four, or at least that is my guesstimate without drawing out the various circuits on paper.

09-03-2018, 09:48 AM	#4
pdad Not Yet Wild Join Date: Jul 2017 Posts: 8	Re: Series motor - "S" and "A" post wiring Thanks for the info guys! Guess as long as the cart goes as and where planned, all is good :)
pdad Not Yet Wild Join Date: Jul 2017 Posts: 8

09-03-2018, 05:59 PM	#5
yurtle Gone Mad Join Date: Oct 2009 Location: Buford, GA Posts: 8,988	Re: Series motor - "S" and "A" post wiring Print out the diagram and label it the way you have it. That will help you figure out future problems. You'll have'em.

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

09-03-2018, 08:06 PM	#6
pdad Not Yet Wild Join Date: Jul 2017 Posts: 8	Re: Series motor - "S" and "A" post wiring On an '89 - prob lots of troubles in my future. TY for the tip of labeling drawing to match mine - great idea!
pdad Not Yet Wild Join Date: Jul 2017 Posts: 8

09-04-2018, 12:19 AM	#7
yurtle Gone Mad Join Date: Oct 2009 Location: Buford, GA Posts: 8,988	Re: Series motor - "S" and "A" post wiring I'm an engineer. If it ain't broke, it just don't got enough features. I'm behind on updating my diagrams in Visio, but what ain't in Visio, is on crude sketches.

Similar Threads
Thread	Forum
Big "thank you!" to JohnnieB and Yurtle, was "EZGO TXT Non-PDS Help/Questions"	Electric EZGO
2001 DS "bucks" or "jerks" at low speed...	Electric Club Car
will 2011 "PH" controller work on 2007 "PQ"?	Electric Club Car
Club Car belt/clutch won't "change", as stuck in "low" gear	Gas Club Car
Why "Carbon Fiber" "Wood grain" and Diamond Plated?	Gas EZGO