3200, 4100, 4300, 4400, 7300, 7400, 7500, 7600, 7700, 8500, 8600, RXT Models Built March 1, 2007 to March 18, 2008 — ELECTRICAL CIRCUIT DIAGRAMS iii 6.4. SNOW VALVE, P. 4........................................................................................89 7. ELECTRONIC ENGINES (CHAPTER 7)...........................................................................90 7.1. ELECTRONIC ENGINE CONTROLS, CAT ENGINES, P. 1..........................................90 7.2. ELECTRONIC ENGINE CONTROLS, CAT ENGINES, P. 2..........................................91 7.3. ENGINE BODY BUILDER — REMOTE ENGINE CONTROL (CAT/IBBE ENGINE), P. 3........92 7.4. ELECTRONIC ENGINE CONTROLS, ISM ENGINES, P.
4...........................................93 7.5. ELECTRONIC ENGINE CONTROLS, ISM ENGINES, P. 5...........................................94 7.6. ELECTRONIC ENGINE CONTROLS, ISM ENGINES, P. 6...........................................95 7.7. ELECTRONIC ENGINE CONTROLS, I6 ENGINES, P. 7.............................................96 7.8. ELECTRONIC ENGINE CONTROLS, I6 ENGINES, P. 8.............................................97 7.9. ELECTRONIC ENGINE CONTROLS, I6 ENGINES, P. 9.............................................98 7.10. ELECTRONIC ENGINE CONTROLS, I6 ENGINES, P. 10..........................................99 7.11. ELECTRONIC ENGINE CONTROLS, I6 ENGINES, P.
11.........................................100 7.12. ELECTRONIC ENGINE CONTROLS — V8 ENGINES, P. 12.....................................101 7.13. ELECTRONIC ENGINE CONTROLS — V8 ENGINES, P. 13.....................................102 7.14. ELECTRONIC ENGINE CONTROLS — V8 ENGINES, P. 14.....................................103 7.15. CRUISE CONTROL, P. 15.............................................................................104 8. GAUGES WITH AND WITHOUT INTERNAL WARNING LIGHT (CHAPTER 8).............................105 8.1. IP/GAUGES, P. 1.........................................................................................105 8.2. WARNING LIGHT LIST, P.
2............................................................................106 8.3. WARNING LIGHTS CONTROLLED BY ENGINE, TRANSMISSION, ABS CONTROLLER, P. 3.............................................................................................................107 8.4. ENGINE OIL PRESSURE AND TEMP, SPEEDOMETER, TACHOMETER, VOLTMETER AND WATER TEMP GAUGE CIRCUITS, P. 4...............................................................108 8.5. IP/GAUGES AND WARNING LIGHTS — GAUGE CLUSTER, P. 5...............................109 8.6. AIR PRESSURE INPUT CIRCUIT, P. 6................................................................110 8.7. AXLE TEMPERATURE, GAUGE INPUT CIRCUIT, P.
7.............................................111 8.8. FUEL GAUGE CIRCUITRY (SINGLE TANK), P. 8...................................................112 8.9. DIFFERENTIAL LOCK WARNING LAMPS, P. 9.....................................................113 8.10. AIR PARK BRAKE AND MANUAL TRANSMISSION OIL TEMP GAUGE, P. 10...............114 8.11. GAUGES AND WARNING LIGHTS — AMMETER, P. 11..........................................115 8.12. ENGINE OIL TEMPERATURE GAUGE WITH CATERPILLAR, P. 12............................116 8.13. FRONT AXLE ENGAGEMENT LAMP, P. 13........................................................117 8.14. WARNING LIGHTS — OPTIONAL, P.
14............................................................118 8.15. WARNING LIGHTS — OPTIONAL, P. 15............................................................119 8.16. LOAD MONITORING, P. 16...........................................................................120 9. LIGHTS (CHAPTER 9)..............................................................................................121 9.1. BACKUP LIGHTS N/ ALLISON TRANSMISSION, P. 1.............................................121 9.2. BACKUP LIGHTS W/ ALLISON TRANSMISSION, P. 2.............................................122 9.3. LIGHT SYSTEMS CLEARANCE, MARKER, PARK, TAIL, TURN AND STOP LIGHTS, P.
3.............................................................................................................123 9.4. LIGHT SYSTEMS CLEARANCE, MARKER, PARK, TAIL, TURN AND STOP LIGHTS (CONT.), P. 4...............................................................................................124 9.5. LIGHT SYSTEMS CLEARANCE, MARKER, PARK, TAIL, TURN AND STOP LIGHTS (CONT.), P. 5...............................................................................................125 9.6. LIGHT SYSTEMS CLEARANCE, MARKER, PARK, TAIL, TURN AND STOP LIGHTS (CONT.), P. 6...............................................................................................126 9.7.
LIGHT SYSTEMS — TURN SIGNAL AND STOP SWITCHES, P. 7...............................127 9.8. DOME LIGHT, MAP LIGHT, P. 8........................................................................128 9.9. DOME LIGHT, MAP LIGHT (CONT.), P. 9.............................................................129 S08322