ENGINE MANIFOLD PREHEATER SYSTEM (cont)

ENGINE MANIFOLD PREHEATER SYSTEM (cont) - TM-9-2350-256-20_145

ENGINE MANIFOLD PREHEATER SYSTEM (cont) - TM-9-2350-256-20_147

TM-9-2350-256-20 Carrier Cargo Tracked 6-Ton M548A1 (2350-01-096-9356) M548A3 2350-01-369-6081 Manual
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CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS TM 9-2350-256-20 2-19 ELECTRICAL TROUBLESHOOTING- Continued ENGINE MANIFOLD PREHEATER SYSTEM-Continued WARNING Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry contacts a metal surface a direct short may result in instant heating of tools, damage to equipment, and injury or death to personnel. N Reconnect engine wiring harness to fuel solenoid. Disconnect lead from spark plug. Hold lead close to engine and turn MASTER switch on, push START and manifold preheat switches, and check for spark. Turn MASTER switch OFF. If spark is present, replace spark plug (see paragraph 4-21). If spark is not present, replace manifold preheater ignition unit (see paragraph 4- 19). O Reconnect switch panel to neutral safety switch to bulkhead harness to main switch panel. Disconnect switch panel to gage panel and miscellaneous switches wiring harness from main switch panel. Place red lead of multimeter on pin M of wire 10 and black lead to ground. Turn MASTER switch on push START switch, and check for voltage. Turn MASTER switch OFF. If voltage is present, go to step P. If voltage is not present, troubleshoot battery circuit. P Place a jumper wire from bracket to hull to ground the panel. Reconnect switch panel and miscellaneous switches wiring harness to main switch panel. Disconnect wire 14 from START switch side of 20 A circuit breaker. Place red lead of multimeter on terminal of 20 A circuit breaker and black lead to ground. Turn MASTER switch on and check for voltage. Turn MASTER switch OFF. If voltage is present, go to step R. If voltage is not present, go to step Q. 2-78

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