Lull 944E-42 Service Manual - Manual (Page 511)

9.1 Model 644E-42/944E-42 Rev. 6/04
Section 9
Electrical System
Contents
PARAGRAPH TITLE PAGE
9.1 Electrical Component Terminology.............................................................................................. 9.5
9.1.1 General Overview (Open Cab Harness) ............................................................................. 9.5
9.1.2 General Overview
(644E-42, SN 20118 & Before, 0160002519 thru 0160003689 - Vehicle Power Harness).
9.6
9.1.3 General Overview (644E-42, SN 0160003690 & After - Vehicle Power Harness) .............. 9.7
9.1.4 General Overview (944E-42 ECM Vehicle Power & ECM Cab Harnesses)........................ 9.8
9.1.5 General Overview (Vehicle Sensor Harness) ..................................................................... 9.9
9.1.6 General Overview (Vehicle Control Harness) ..................................................................... 9.10
9.1.7 General Overview (Vehicle Transmission Harness) ............................................................ 9.11
9.1.8 General Overview (Optional Single Joystick Harness) ....................................................... 9.12
9.1.9 General Overview (Optional Closed Cab Harness) ............................................................ 9.13
9.1.10 General Overview (Optional Roadlight Harness)................................................................ 9.14
9.1.11 General Overview (Optional Worklight Harness) ................................................................ 9.15
9.1.12 General Overview (Vehicle Ground Strap Locations) ......................................................... 9.16
9.2 Service Warnings........................................................................................................................... 9.18
9.2.1 General ............................................................................................................................... 9.18
9.2.2 Battery ................................................................................................................................ 9.18
9.3 Specifications ................................................................................................................................ 9.18
9.4 Effective Ground Connections ..................................................................................................... 9.19
9.5 Grounding Straps .......................................................................................................................... 9.19
9.6 Wiring Harnesses .......................................................................................................................... 9.19
9.6.1 Removal and Replacement................................................................................................. 9.20
9.6.2 Disassembly........................................................................................................................ 9.20
9.6.3 Cleaning and Drying ........................................................................................................... 9.20
9.6.4 Inspection and Repair ......................................................................................................... 9.20
9.6.5 Installation........................................................................................................................... 9.20
9.6.6 Wire Code and Color .......................................................................................................... 9.20
9.7 Fuses and Relays........................................................................................................................... 9.21
9.7.1 Circuit Protection - Fuses.................................................................................................... 9.21
9.7.2 Fuse and Relay Locations .................................................................................................. 9.22
9.7.3 Fuse and Relay Replacement............................................................................................. 9.25
9.8 Electrical System Troubleshooting .............................................................................................. 9.27
9.8.1 Introduction ......................................................................................................................... 9.27
9.8.2 944E-42 ECM Diagnostic System....................................................................................... 9.28
9.8.3 Troubleshooting with a Digital Multimeter (DMM) ............................................................... 9.29
9.8.4 Probing Electrical Connectors ............................................................................................ 9.30
9.8.5 Main Electrical Schematic Legend...................................................................................... 9.35
9.8.6 Electrical Symbols Directory ............................................................................................... 9.47