TM  9-2320-387-24-l PROTECTIVE   CONTROL   BOX KNOWN INFO BAllERlES OK LEAD  578   GROUND   OK IGNITION    SWITCH  OK HARNESS    WIRE  29A  OK HARNESS    WIRE  29C  OK PARKING    BRAKE   SWITCH   OK BODY   HARNESS   WIRES   OK POSSIBLE PROBLEMS GLOW  PLUG  CONTROLLER BAD ALTERNATOR    BAD HARNESS   WIRE  2A  BAD PROTECTIVE    CONTROL   BOX BAD KNOWN INFO BAllERIES OK LEAD   578   GROUND   OK IGNITION    SWII%H   OK HARNESS    WIRE  29A  OK HARNESS    WIRE  29C  OK PARKING    BRAKE   SWlTCH   OK BODY   HARNESS   WIRES   OK POSSIBLE PROBLEMS GLOW   PLUG  CONTROLLER BAD ALTERNATOR     BAD HARNESS   WIRE  2A  BAD PROTECTlVE     CONTROL   BOX BAD I KNOWN   INFO BAllERlES OK LEAD   578   GROUND   OK IGNITION    SWlTCH  OK HARNESS   WIRE  29A  OK i HARNESS   WIRE  29C  OK PARKING    BRAKE   SWITCH   OK BODY   HARNESS   WIRES   OK GLOW   PLUG  CONTROLLER     OK POSSIBLE    PROBLEMS ALTERNATOR     BAD HARNESS   WIRE  2A  BAD PRO?ECTlVE     CONTROL BOX  BAD r IS  LED 8 ON? DIAGNOSTIC    FLOWCHART -- 1 OPTIONS 1.  TSY   rr. 2.   VISUAL REASON    FOR   QUESTlON If this LED   is not ON,  that would indicate  a  PCB  malfunction. PROTECTIVE IS  LED  11 ON? DURING  GLOW  PLUG  CYCLING, LED  11 MAY  FLICKER. VISUAL / 7 REASON    FOR  QUESTION WITH  THE  IGNITION   SWITCH   IN THE  START  (ENGINE  CRANKING) POSITION,   DO  LEDs 11 AND  13 GO  OUT,  AND  DOES  ENGINE CRANK? 18 1 TEST   OPTIONS 1 1.   TRY   rr. 2.   VISUAL i REASON     FOR  QUESTlON If these  LEDs  do  not go ON, that would  indicate  malfunctioning batteries. CHECK   BATTERY VOLTAGE    AND YES ? 2-224