Wiring Harness Diagrams

We sell a number of wiring harnesses and we’ve been adding some helpful diagrams to our site to assist you with installing the kits. If you’ve recently purchased a wiring harness from us, or if you are thinking about it, please check out our wiring harness diagrams now available.

Also, keep in mind when purchasing wiring harnesses, that it is important to read the full description.  Sometimes, there are different kits for the same tractor based on the electrical setup (location of voltage regulator, etc).  You can avoid costly mis-orders by reading the full product descriptions on our site and comparing against your serial number and electrical setup.  Most harnesses are designed for the factory charging system. If your tractor was originally 6 volt and you have converted to 12 volt, the wires for the charging system will have to be modified.

ABC075 – Ford 9N, 2N Wiring Harness Instructions
ABC076 – Ford 8N Front Mounted Distributor Wiring Harness Instructions
ABC077 – Ford 8N Side Mount Distributor Wiring Harness Instructions
ABC078 – Ford NAA Wiring Harness Instructions
ABC079 – Ford 600, 700, 800, 900 Series Gas (1955-1957) Wiring Harness Instructions
ACS329 – Allis Chalmers G Wiring Harness Instructions
ACS331 – Allis Chalmers WD, WD45 Gas Wiring Harness Instructions
ACS335 – Allis Chalmers B, C, CA, IB (Serial Number 55301 and up) Wiring Harness Instructions
ACS352 – Allis Chalmers RC, WC, WF Wiring Harness Instructions
CKS112 – Case: VAC (up to sn 557000), V, VA all with cutout relay Wiring Harness Instructions
COS021 – Cockshutt: 30, 20, E2, E3 (except Farmers Union E3) all with cutout relays Wiring Harness Instructions
FDS277 – Ford 8N (with side mounted distributor and one wire alternator) Wiring Harness Instructions
FDS376 – Ford Gasoline Models only: 501, 601, 701, 801, 901, 2000 (4 CYL), 4000 (4 CYL 1958-1964), 1801 Series Wiring Harness Instructions
FDS470 – Ford 9N, 2N WITH SINGLE TERMINAL GENERATOR Wiring Harness Instructions
FDS472 – Ford: 8N (up to sn 263843) with front mounted distributor Wiring Harness Instructions
FDS474 – Ford: JUBILEE, NAA, 600, 700, 800, 900 GAS SERIES (1953-57) Wiring Harness Instructions
FDS1703 – 8N with side mounted distributor (sn 263844 and up, 1950 – 1952) Wiring Harness Instructions
IHS480 – Farmall H IF CONVERTED TO REGULATOR ON GENERATOR Wiring Harness Instructions
IHS481 – Farmall: A, AV, Super A (up to sn 354198), B, BN (ALL WITH CUTOUT RELAY) Wiring Harness Instructions
IHS482 – Farmall C (WITH CUTOUT), Super C (WITH CUTOUT) Wiring Harness Instructions
IHS483 – Farmall Super H, Super HV (sn 19234 and up), WITH BATTERY UNDER SEAT Wiring Harness Instructions
IHS484 – Farmall Super A (sn 354199 and up), B, BN (ALL WITH REGULATOR) Wiring Harness Instructions
IHS485 – Farmall M IF CONVERTED TO REGULATOR ON GENERATOR Wiring Harness Instructions
IHS486 – Farmall M (with regulator on steering post, under fuel tank, sn FBK 229911 and up), Early Super M (sn F501 – F28174 and sn L500001 – L504801 Gas) WITH BATTERY BOX UNDER FUEL TANK Wiring Harness Instructions
IHS487 – Farmall FITS FOLLOWING WITH BATTERY UNDER SEAT: Super M (sn F28175 and up, AND sn L504802 and up), MTA (sn F28175 and up AND sn L504802 and up) Wiring Harness Instructions
IHS488 Farmall: Super H (up to SN: 19233) with battery under tank, HV (sn 501 – 19233) Wiring Harness Instructions
IHS891 – Farmall: Cub (sn 165153 – 210000) with voltage regulator, Cub LoBoy (up to sn 10000) WITH VOLTAGE REGULATOR Wiring Harness Instructions
IHS893 – Farmall: Cub (sn 501-115402) with cutout relay Wiring Harness Instructions
IHS895 – Farmall: Cub (sn 115403 – 165152) with voltage regulator Wiring Harness Instructions
IHS904 – Farmall: H, HV (ALL up to sn 350953 WITH CUTOUT ON TOP OF GENERATOR) Wiring Harness Instructions
IHS906 – Farmall: H, HV (ALL sn 350954 and up WITH REGULATOR UNDER FUEL TANK) Wiring Harness Instructions
IHS908 – Farmall: M, MV (ALL up to sn 229910 WITH CUTOUT ON THE GENERATOR) Wiring Harness Instructions
JDS806 – John Deere: A (up to sn 584000) with magneto or distributor ALL w/ cut out relay Wiring Harness Instructions
JDS808 – John Deere: A (sn 584000 and up) WITH MAGNETOR OR DISTRIBUTOR Wiring Harness Instructions
JDS810 – John Deere: B (up to sn 201000) with magneto or distributor ALL w/ cut out relay Wiring Harness Instructions
JDS812 -  John Deere: B (sn 201000 and up) with magneto or distributor ALL w/ voltage regulator Wiring Harness Instructions
JDS814  – John Deere: G (sn 26000 and up) with magneto or distributor ALL w/ voltage regulator Wiring Harness Instructions
JDS816 – John Deere: H with magneto or distributor ALL w/ cut out relay. Wiring Harness Instructions
JDS818 – John Deere: M, MC, MI, MT w/ cut out relay. Wiring Harness Instructions
JDS820 – John Deere: 330, 430 SERIES WITH VOLTAGE REGULATOR Wiring Harness Instructions
JDS920 – John Deere 530, 630, 730  Wiring Harness Instructions
MHS063 – Massey Harris: Pony WITH CUTOUT RELAY 1947 THRU 1951 USING AUTOLITE # GBM-4804 GENERAT
OR Wiring Harness Instructions
MHS065 – Massey Harris Rowcrops only 30, 30K Wiring Harness Instructions
MHS067 – Massey Harris Rowcrop only Early 44 SERIES (GAS / LP, up to sn 44GS16143, up to sn 44KS6607, up to sn 44GR28635, up to sn 44KR3984, up to sn 44GRA1016) Wiring Harness Instructions
MHS069 – Massey Harris Rowcrops only Late 44 (GAS / LP, sn 44GS16143 and up, sn 44KS6607 and up, sn 44GR28635 and up, sn 44KR3984 and up, sn 44GSA1001 and up, sn 44GRA1016 and up, sn 44BS1001 and up, sn 44BR1001 and up) Wiring Harness Instructions