TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 REFERENCE INFORMATION Change 1 2-337 Engine temperature must be below 120°F (49° C) or the lamp may not come on. INSTRUMENTS CIRCUIT Replace PCB, refer to (para. 4-5). Replace distribution box (para. 4-5.1). There is battery voltage at the PCB/distribution box at all times. Failure to disconnect battery cable will result in damage to equipment or injury to personnel. WARNING Disconnect negative battery cable before disconnecting and reconnecting protective control box/distribution box harness.