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TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download

Page 375 of 1205

TM 9-2320-387-24-l INSTRUMENTS CIRCUIT REFERENCE INFORMATION w WARNING Disconnect negative battery cable before disconnecting and reconnecting PCB harness. WARNING There is battery voltage at the PCB at all times. Failure to disconnect battery cable will result in damage to equipment or injury to personnel. 6 CONTROLLER 3 27F 27D RESISTANCE AND CONTINUITY 04,500 OHMS STEIlCE-R TEST 91 1. Connect RED clip and BLACK clip to the terminations indicated in the question. RED to the first, BLACK to the second. 2. Start Test 91,0-4.500 Ohms. 3. Displayed reading is in ohms. Less than 5 ohms is continuity. If the resistance is over 4.500 ohms, STEIICE-R displays .9.9.9.9. CONTINUITY (RESISTANCE) MULTMETER 1. Set the voltmeter to an ohms scale of about 1,000 ohms. 2. Connect the RED and BLACK leads to the connections stated in the question. 3. Be sure to read the correct scale. Less than 5 ohms indicates continuity. For an open circuit, the meter should peg full scale (needle all the way to the left). WAIT-TO-START LAMP I GLOW PLUG CONTROLLER /% ) \ 1 Repair/replace harness (para. 4-90). controller will cause the circuit to be I open. CONTROLLER HARNESS GLOW PLUG CONTROLLER HARNESS Replace glow plug controller (para. 4-33). w PCB ENGINE CONNECTOR 2-321