S40-45 Ford 2WD & 4WD - Electrical Index - Wiring Change Notes

Oct 25, 2026

S40-45 Ford 2WD and 4WD electrical schematic index with relay panel, ground control box, and platform control box legend references. Covers multiple schematic ranges for LSG 423 and LRG 423, plus EFI LRG 425, including sections for relay wiring descriptions and function-enabled variants. Includes wiring change notes effective from S40-188 to 271, specifying CR8 relay power routing from TB33 and N.C. series wiring with CR4 relay.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages24

Reading Time1 h 0 min

AccessFree to download

S-Boom Index

S1S40/45 Ford 2WD & 4WD

S40/45 Ford Index

Notes

S40/45 Ford Index

Labels and Descriptions

S-Boom Index # S1S40/45 Ford 2WD &4WD Page:Model:Serial Number:S1-01AS40-Ford LSG 423 Electrical Schematic…………… …………… …101 to 271S1-01BS40-Ford LSG 423 Electrical Schematic(cont'd)IIIIIIIIS1-02S40-Ford LSG 423 Relay Panel Legend"111111S1-03S40-Ford LSG 423 Ground Control Box Legend111fIl1fS1-04S40-Ford LSG 423 Platform Control Box LegendI1111111S1-05AS40-Ford LRG 423 Electrical Schematic………… …… ……… …… 272 to 830S1-05BS40-Ford LRG 423 Electrical Schematic(cont'd)11111111S1-06S40-Ford LRG 423 Relay Panel Legend1l1lIl1lS1-07S40-Ford LRG 423 Ground Control Box LegendI1111111S1-08S40-Ford LRG 423 Platform Control Box Legend1l1lIlIlS1-09AS40-Ford LRG423 Electrical Schematic with Function Enable………………………………832 to 1423S1-09BS40-Ford LRG 423 Electrical Schematic with Function Enable(cont'd)1l1lIl1lS1-10S40-Ford LRG 423 Ground Control Box Legend with Function Enable1l 1lIl11S1-11S40-Ford LRG 423 Platform Control Box Legend with Function EnableIl 1lIl11S1-12AS40-Ford LRG 423 Electrical Schematic with Simultaneous Functions………………………1425 to 1789S1-12B1111S1-13S40-Ford LRG 423 Ground Control Box Legend with Simultaneous Functions " "II1lS1-14S40-Ford LRG423 Platform Control Box Legend with Simultaneous Functions " "1111S1-15AS40/45-Ford LRG 425 EFI Electrical Schematic……………… ………1790 &aboveS1-15BS40/45-Ford LRG 425 EFI Electrical Schematic(cont'd)I1111111S1-16S40/45-Ford LRG 425 EFI Ground Control Box LegendII1lII1lS1-17S40/45-Ford LRG 425 EFI Platform Control Box Legend1111111S1-18S40/45-Ford LRG 425 EFI Engine Harness1l"Il1l ## S40/45 Ford Index NOTES: THE FOLLOWING WIRING CHANGES TAKE PLACE FROM S40-188 TO 271CR8 RELAY RECEIVES POWER FROM TB33 INSTEAD OF IGN/START MODULE.THE N.C.SIDE OF CR8 RELAY IS WIRED IN SERIES WITH CR4 RELAY. ## S40/45 Ford Index S40/45 Ford Index IGNITION COIL GNI TION MODULE PUR WHT RED GRN BLK ORG 0 GOVERNOR WATER TEMP.GAGE | | S40/45 Ford Index HORSE POWER LIMITER 一 STEER LEFT PRIMARY ud SWNG LEFT SWNG RIGHT SWNG F.C. EXTEND PLAT.L.DN. PLAT.LV.F.C. 2W/4WD E.D.C. BRAKE START GLOW PLUG RPM SIEER RIGHT GAS sPARE SPARE SPARE PRIMARY DN. PRIMARY F.C. RETRACT HORN SEC.B0OM UP SEC.BOOM DN. DRV.ENA. DRV.ENA.LT. PLAT.LW.UP PLAT.ROT.7. PLAT.ROT.R. TLT ALARM PWR. TO PLAT. PWR. FRM PLAT. PMR.(CONT.) PMR.(START) PWR.TO F.S. AUx.PWR. E.D.C. LIMIT SWTCH PULSE PICKUP SPRE SPARE N C 23 0 : : 16 8 心 8 出出 40 志志本 45 a 三 · o· o BLU/WHT-1 BLU/WHT-3 ORG-3 BLU/BLK-1 BLKWHT-1 RED-3 RED/BLK-3 RED/WHT-3 WHT/RED-3 BLK/WHT-3 BLK/RED-3 BLU-3 BLU/8LK-3 BLU/RED-3 ORG/旧LK-3 CRN/旧LK-3 BLK-2 GREEN(F.S.) BLK(F.S.) RED-1 RED/BLK-1 RED/WHT-1 WHT-1 WHT/BLK-1 WHT/RED-1 BLK-1 BLK/RED-1 BLU-1 BLU/RED-1 ORG/旧LK-1 ORG/RED-1 GRN-1 CRN/BLK-1 CRN/WHT-1 WHT-3 WHT/8LK-3 BLK-3 ORG/RED-3 CRN-3 CRN/WHT-3 WHT-2 WHT)H.P.L) ORG-1 吉 GRD.STUDTILTALARM GRN-2 DP1 | 0 | | | --- | --- | | | | | 卜 | | | | | | 0 | | | LD | | | 寸 | | | M | | | N | | | | | | 大 | | | | | BP1 | 匠 | | | --- | --- | | | | | | | | |

FAQs

What wiring change notes apply from S40-188 to 271?

The notes specify wiring changes starting at S40-188 through 271, including CR8 relay power coming from TB33 instead of the IGN/START module.

How is the N.C. side of CR8 relay connected relative to CR4 relay?

The notes state the N.C. side of CR8 relay is wired in series with CR4 relay.

What sections are included in the S40/45 electrical schematic index?

The index lists electrical schematics and legends for relay panels, ground control boxes, and platform control boxes across LSG 423, LRG 423, and EFI LRG 425 ranges.

Oct 25, 2026

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