Hummer H1 Service Manual page 1056

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Fuel Filler Housing Replacement . . . . . . . . . 10-63
Fuel Filter
Drain Hose and Valve Replacement . . . . . 3-32
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31
Fuel Filter Warning Lamp . . . . . . . . . . . . . . . . . 2-4
Fuel Injection Line
Installation . . . . . . . . . . . . . . . . . . . . . . . . . 2-92
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-53
Fuel Injection Pump
Fuel Supply and Return Line Removal . . . 2-53
Installation . . . . . . . . . . . . . . . . . . . . . . . . . 2-87
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-56
Fuel Injection Pump Boot Replacement . . . . . 3-33
Fuel Injection System
Injection Line Bracket and Clamp . . . . . . . 3-36
Fuel Lift Pump Service . . . . . . . . . . . . . . . . . . 3-33
Fuel System
Contamination . . . . . . . . . . . . . . . . . . . . . . 3-41
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Electronic Accelerator Pedal . . . . . . . . . . . . 3-4
Electronic Injection Pump . . . . . . . . . . . . . . 3-3
Essential Tools . . . . . . . . . . . . . . . . . . . . . . 3-45
Fuel Filter-Water Separator . . . . . . . . . . . . . 3-3
Fuel Injectors . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Fuel Lift Pump . . . . . . . . . . . . . . . . . . . . . . . 3-2
Fuel Lift Pump Inoperative . . . . . . . . . . . 12-44
Fuel Lift Pump Schematic . . . . . . . . . . . . 12-46
Fuel Manager Schematic . . . . . . . . . . . . . 12-50
Fuel Selector Valve . . . . . . . . . . . . . . . . . . 3-30
Fuel Selector Valve Schematic . . . . . . . . 12-49
Fuel Tank Selector System Inoperative . . 12-47
Fuel Tanks, Lines, and Valves . . . . . . . . . . . 3-4
Glow Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Fuel Tank
Auxiliary Fuel Tank . . . . . . . . . . . . . . . . . . 3-26
Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Fuel Level Transmitter and Tank
Access Plate Service . . . . . . . . . . . . . . . . . 3-28
Fuel Tank Vent Line Service . . . . . . . . . . . 3-29
Main Fuel Tank . . . . . . . . . . . . . . . . . . . . . 3-24
Main/Auxiliary Tank Fuel Line . . . . . . . . . 3-29
Vent Filter Replacement . . . . . . . . . . . . . . 3-29
05745159
Geared Hub
Input Seal Replacement . . . . . . . . . . . . . . . 9-11
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Side Cover Replacement . . . . . . . . . . . . . . 9-11
Spindle Bearing Adjustment . . . . . . . . . . . 9-19
Spindle Seal Replacement . . . . . . . . . . . . . 9-17
Vent Line Replacement . . . . . . . . . . . . . . . 9-24
General Body Information . . . . . . . . . . . . . . . . 10-2
General Information
Auxiliary Power Point, Interior Fuse Box 12-10
Auxiliary Power Studs, Exterior
Fuse Box . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
Circuit Faults . . . . . . . . . . . . . . . . . . . . . . . 12-4
Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . 12-5
Fuse/Relay Location and Identification . . 12-10
Ground Points . . . . . . . . . . . . . . . . . . . . . 12-13
Preliminary Checks . . . . . . . . . . . . . . . . . . 12-3
Glovebox Replacement . . . . . . . . . . . . . . . . . 10-19
Glow Plug
Glow Plug and Injection Nozzle . . . . . . . . 2-90
Glow Plug Removal . . . . . . . . . . . . . . . . . . 2-54
Glow Plug Test . . . . . . . . . . . . . . . . . . . . . . 2-6
Operation and Testing . . . . . . . . . . . . . . . . . 2-6
Relay/Controller Replacement . . . . . . . . . . 3-40
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Glow Plugs
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . 12-40
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . 12-43
Halfshaft Boot Replacement . . . . . . . . . . . . . . 9-21
Heated Glass
Both Heated Windshields Inoperative . . . 12-92
Heated Windshield Schematic . . . . . . . . . 12-93
Left Heated Windshield Inoperative . . . . 12-90
Rear Window Defroster Inoperative . . . . 12-94
Index 14-5
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