Wiring a 656 gas w/original alternator 12v system

All other non-specific model Farmall / IH / CASE tractors. (Catch-All)
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
Posts: 2
Joined: Sun Mar 15, 2020 1:50 am
Zip Code: 17747

Wiring a 656 gas w/original alternator 12v system

Postby Breon0321 » Sun Mar 15, 2020 2:06 am

So we have a 656 gas that from factory had 12v alternator system. However my dad was driving it and the wiring harness caught fire. So i converted the alternator to a single wire alternator and from what im reading im going to have issues making amp light and oil pressure light to work....can anyone give me some insight on the best way to wire this tractor without spending a fortune on a harness...thanks!!!

User avatar
10+ Years
10+ Years
Posts: 2674
Joined: Mon Oct 24, 2005 11:35 am
Zip Code: 14072
eBay ID: toysforjake
Tractors Owned: Lots of Cub Cadets!
1951 Farmall Cub
1977 IH Cub
1966 IH Cub
1965 IH Lo Boy
1964 IH Lo Boy
1949 Farmall Cub
Several IH 154 Lo Boys
1979 IH 184 Lo Boy
Simplicity 4416 Sovereign
Simplicity Conquest
Simplicity Legacy 4x4 Diesel
Mitsubishi MT180D 4x4 Diesel
Circle of Safety: Y
Location: Grand Island, NY

Re: Wiring a 656 gas w/original alternator 12v system

Postby gitractorman » Mon Mar 16, 2020 7:52 am

I believe that even on a single wire alternator, you have the 2 other terminals that are typically used for those lighted features. I'm in the middle of wiring a Farmall M that I just installed a single wire 12-v GM/Delco alternator on, and I know it has the terminals you need, however, I'm not using them so I'm not sure how to tell you to wire it.

Here is the alternator I used, and you can see the 2 terminals:

If you look at some of the 6v to 12v conversions you'll find the wiring schematics and you should be able to figure out the wiring needed, without having to purchase a whole harness.
Cub Cadets 682, 1811, 1864, Simplicity Legacy XL 4x4 Diesel with FEL, 60" mower, 50" Tiller

User avatar
10+ Years
10+ Years
Posts: 3165
Joined: Wed May 11, 2011 8:59 pm
Zip Code: 39154
Tractors Owned: 1948 Allis Chalmers G
1947 Cub
1952 Cub
1940 Farmall H
154 Cub LoBoy
Location: Vicksburg, MS

Re: Wiring a 656 gas w/original alternator 12v system

Postby tmays » Fri Jul 10, 2020 9:11 pm

Could you tell me what group size battery you have in the 656? And does it fit with the cover installed? Thanks

Cub Star
Cub Star
Posts: 145
Joined: Tue Jan 01, 2019 10:16 am
Zip Code: 49816

Re: Wiring a 656 gas w/original alternator 12v system

Postby Saucymynx » Wed Feb 23, 2022 4:44 pm

Breon, did you figure this alternator issue out? I am looking at replacing mine as well and would love to know what you learned. Thanks

Return to “Farmall / IH / CASE”

Who is online

Users browsing this forum: No registered users and 0 guests