CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONSTM 9-2350-256-202-19 ELECTRICAL TROUBLESHOOTING-ContinuedENGINE OIL PRESSURE GAGE-Continued'WARNINGRemove all jewelry such as rings, dog tags,bracelets, etc. If jewelry contacts a metalsurface a direct short may result in instantheating of tools, damage to equipment,and injury or death to personnel.FReconnect bulkhead to engine bracket and rear fueltank wiring harness to bulkhead. Remove engine deck(see paragraph 9-51). Disconnect bulkhead to enginebracket and rear fuel tank wiring harness to enginedisconnect. Place red lead of multimeter in socket F ofwire 36 and black lead to ground. Turn MASTERswitch on and check for voltage. Turn MASTER switchOFF. If voltage is present, go to step G. If voltage isnot present, repair/replace wire 36 of bulkhead toengine bracket and rear fuel tank transmitter wiringharness (see paragraph 6-73 for dual voltage; 6-74 forsingle voltage).GReconnect bulkhead to engine bracket and rear fueltank transmitter wiring harness to engine disconnect.Remove powerplant (see paragraph 3-1). Disconnectwire 36 from engine oil pressure sending unit. Placered lead of multimeter in wire 36 and black lead toground. Turn MASTER switch on and check forvoltage. Turn MASTER switch OFF. If voltage ispresent, replace engine oil pressure sending unit (seeparagraph 6-22). If voltage is not present,repair/replace wire 36 of engine wiring harness (seeparagraph 6-58 for dual voltage; 6-59 for singlevoltage).2-108
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