Part of the John Deere Repair Manuals.
This is the John Deere electrical diagnostics service manual (TM4487ELEC) for the early 6100, 6200, 6300 and 6400 tractors, covering machines up to approximately serial number 101000 with the Saran-built 3029, 4039, 4045, 6059 and 6068 engines. Its 149 pages are written for an experienced technician working the electrical system.
The manual is built around functional schematics and wiring harness diagrams: system diagrams for the complete tractor, plus engine, cowl, transmission and cab roof harness drawings with component locations and instrument unit plug arrangements. The sub-system diagnostics group provides step-by-step tests for the starting motor and charging circuit, instrument unit and lighting, exterior lights, blower and air conditioning, and the electronic rockshaft control.
Use it to trace no-start, charging, lighting, gauge, HVAC and rockshaft faults by circuit, with fuse ratings and pin assignments called out.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Foreword | 4 | Introduction, Safety Messages, Manual Structure, Service Information |
| Electrical Wiring Information | 5 | Wiring Variations, Diagnostic Identification Method, Fuse F105 Check |
| Group 10 - System Diagrams (Ece) | 6-13 | Component Designations, Functional Schematics, Wiring Harness Diagrams, Component Locations, Instrument Unit Details |
| Functional Schematic (Complete Tractor) | 14 | Overall Electrical System Layout, Interconnections, Main Power Distribution |
| Engine Wiring Harness Diagram | 31-32 | Engine Electrical Connections, Sensor Locations, Actuator Wiring |
| Cowl Wiring and Harness Diagram | 36-43 | Cowl Area Electrical Routing, Switch Connections, Instrument Panel Wiring |
| Transmission Wiring and Harness Diagram | 46-47 | Transmission Sensors, Solenoids, Control Unit Connections |
| Cab Roof Wiring and Harness Diagram | 50-51 | Cab Lighting, Radio, Wiper Wiring, Roof-Mounted Components |
| Instrument Unit Plug Arrangement | 56 | Plug X25 Definitions, Plug X26 Definitions, Pin Assignments |
| Group 15 - Sub-System Diagnostics (Ece) | 52-59 | Special Tools, Starting Motor Diagnostics, Instrument Unit Diagnostics, Control Unit Diagnostics, Handbrake Diagnostics, PTO Diagnostics |
| SE1-Starting Motor and Charging Circuit | 60-61 | Starting Motor Circuit, Charging Circuit, Overvoltage Protection, Electrical Starting Aids, Fuel Preheater, Indicator Lights Testing |
| SE2-Instrument Unit and Lighting | 65 | Instrument Unit Power Flow, Gauge Operation, Sensor Inputs, Tachometer Pulses |
| SE13-Lights | 109-110 | Parking Light Circuit, Low Beam Operation, High Beam Operation, Hazard Warning Flasher, Cab Frame Lights |
| SE17-Blower and Air Conditioning System | 128-129 | Blower Motor Operation, Resistor Stages, Compressor Clutch Control, Thermostat Switch, Pressure Switch |
| SE21-Electronic Rockshaft Control | 144-145 | Control Unit Inputs, Draft Sensors, Position Sensor, Height Potentiometer, Stepper Motor Operation |
Documents This Manual Refers To
The manufacturer cites these publications by number. We carry them:
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuse F01 Rating | 10 A | p. 15 |
| Fuse F113 Rating | 10 A | p. 15 |
| Fuse F213 Rating | 15 A | p. 27 |
| Fuse F214 Rating | 15 A | p. 27 |
| Fuel Preheater Activation Temperature | 10°C | p. 60 |
| System Voltage (Nominal) | 12V | p. 54 |
| Multimeter Model | JT05791 | p. 59 |
| PTO Speed Meter (540E rpm) | 540E rpm | p. 8 |
| PTO Speed Meter (1000 rpm) | 1000 rpm | p. 8 |
