TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION NO YES NO YES 2-318.8          Change 1 B FROM 4, Page 2-318.4 or A2, Page 2-318.6 GLOWPLUG CURRENT OK NOT CYCLING PROPERLY DISTRIBUTION BOX B1 TURN ROTARY SWITCH TO “STOP”. DISCONNECT DISTRIBUTION BOX. TURN ROTARY SWITCH TO “RUN”. DO GLOW PLUGS STILL DRAW CURRENT? B2 MEASURE VOLTAGE AT SOCKET 6 OF GLOWPLUG CONTROLLER CONNECTOR HARNESS. IS THERE BATTERY VOLTAGE AT THIS SOCKET? GLOWPLUG CURRENT OK GLOWPLUGS NOT     CYCLING GLOWPLUGS DRAW   CURRENT WITH   DISTRIBUTION BOX   DISCONNECTED. WIRING SHORT DISTRIBUTION BOX   (GLOWPLUG POWER   RELAY) If there is a short in the harness, this wire will have battery voltage. REPLACE DISTRIBUTION BOX B3 SHORT IN ENGINE CONNECTOR HARNESS.  REPAIR OR REPLACE HARNESS. If the distribution box is shorted, the glowplug power relay in the distribution box will always be closed. GLOWPLUGS 1. STE/ICE-R TEST 80           (Page 2-749) 2. MULTIMETER 1. STE/ICE-R TEST 89           (Page 2-750) 2. MULTIMETER DIAGNOSTIC FLOWCHART GO TO E, Page 2-318.14