KNOWN INFO POSSIBLE PROBLEMS DIAGNOSTIC FLOWCHART TEST OPTIONS REASON FOR QUESTION KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION TEST OPTIONS REASON FOR QUESTION NO YES NO YES NO YES PROTECTIVE CONTROL BOX/DISTRIBUTION BOX 2-232           Change 1 NOTHING BATTERIES BAD LEAD 57B BAD GROUND PARKING BRAKE SWITCH BAD BODY HARNESS WIRES BAD GLOWPLUG CONTROLLER    BAD ALTERNATOR BAD HARNESS WIRE 2A BAD IGNITION SWITCH BAD HARNESS WIRE 29A BAD HARNESS WIRE 29C BAD PROTECTIVE CONTROL BOX/   DISTRIBUTION BOX BAD LEAD 57B BAD GROUND PARKING BRAKE SWITCH BAD BODY HARNESS WIRES BAD ALTERNATOR BAD HARNESS WIRE 2A BAD IGNITION SWITCH BAD HARNESS WIRE 29A BAD HARNESS WIRE 29C BAD PROTECTIVE CONTROL BOX/   DISTRIBUTION BOX BAD FROM 6, Page 2-230 GO TO 10, Page 2-234 IS LED 7 “ON”? REPAIR/PROPERLY GROUND BODY HARNESS WIRE 57B 7 8 9 VISUAL If this LED is not ON, that would indicate a bad connection to ground. VISUAL If these LEDs are not ON, that would indicate protective control box (PCB)/distribution box malfunctions. ARE LEDS 3 AND 4 “ON”? REPLACE PROTECTIVE CONTROL BOX/DISTRIBUTION BOX BATTERIES OK CONNECT BATTERY GROUND CABLE WITH IGNITION SWITCH IN THE “OFF” POSITION. ARE ANY LEDS “ON”? (REFER TO TABLE AT RIGHT) GO TO 1, Page 2-252 1.  TRY IT 2.  VISUAL If no LEDs are ON, that would indicate malfunctioning batteries. TM 9-2320-280-20-1 KNOWN INFO POSSIBLE PROBLEMS LEAD 57B BAD GROUND PARKING BRAKE SWITCH BAD BODY HARNESS WIRES BAD ALTERNATOR BAD HARNESS WIRE 2A BAD IGNITION SWITCH BAD HARNESS WIRE 29A BAD HARNESS WIRE 29C BAD PROTECTIVE CONTROL BOX/   DISTRIBUTION BOX BAD BATTERIES OK