TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION NO YES NO YES NO YES 2-318.10          Change 1 C FROM A1, Page 2-318.6 C1 TURN ROTARY SWITCH TO “STOP”. IS THERE LESS THAN 0.5 VOLTS AT GLOWPLUG WIRES? GLOWPLUGS DON'T   DRAW ANY CURRENT GLOWPLUG   CONTROLLER WIRING (OPEN CIRCUIT) BAD GLOWPLUGS DISTRIBUTION BOX There should not be voltage at glowplugs with switch off. SHORT IN HARNESS C2 NO SHORTS GLOWPLUGS DRAW       ZERO AMPS GLOWPLUG   CONTROLLER BAD GLOWPLUGS DISTRIBUTION BOX To see if power is getting to glowplugs. REPLACE GLOWPLUGS NO VOLTAGE AT   GLOWPLUGS C3 GO TO D, Page 2-318.12 REPLACE DISTRIBUTION BOX TURN THE ROTARY SWITCH TO “RUN”.  IS THERE LESS THAN 0.5 VOLTS AT THE GLOWPLUG WIRES? TURN ROTARY SWITCH TO “STOP”. MAKE SURE GLOWPLUG CONTROLLER IS CONNECTED.  IS THERE CONTINUITY FROM SOCKET 'A' TO SOCKET 'B' OF DISTRIBUTION BOX ENGINE CONNECTOR HARNESS ? 1. STE/ICE-R TEST 91          (Page 2-752) 2. MULTIMETER NO SHORTS GLOWPLUGS DRAW   NO CURRENT OPEN IN DISTRIBUTION BOX OPEN IN WIRING GLOWPLUGS 1. STE/ICE-R TEST 89        (Page 2-750) 2. MULTIMETER 1. STE/ICE-R TEST 89     (Page 2-750) 2. MULTIMETER Continuity indicates the harness and controller are ok. Non-continuiity indicates an open in the harness or distribution box. DIAGNOSTIC FLOWCHART