TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TM 9-2320-280-20-1 2-31.1. GLOWPLUGS CIRCUIT TESTS (DISTRIBUTION BOX) These tests of the Glowplugs Circuit can be run anytime you think there may be a problem with the glowplugs, or if you were sent here from another test. If you were sent from another test, be sure to mark where you came from so you will be able to return. If you are running this test because the engine is hard to start when cold, remember that there is also a cold start advance circuit (part of the fuel system) which is not checked here. For any starting problem, we recommend running the “STARTABILITY” test chain just to be sure you don't miss anything. At the bottom of this page is a simplified block diagram which shows how the different parts of the glowplug circuit depend on each other and on other engine circuits. ALTERNATOR A.C. LEAD INSTRUMENT POWER GLOWPLUGS DISTRIBUTION BOX WAIT-TO-START LAMP GROUND GLOWPLUGS CIRCUIT SIMPLIFIED BLOCK DIAGRAM FOR DISTRIBUTION BOX BATTERY ALTERNATOR Change 1 2-318.1