REPLACE WAIT-TO -START LAMP 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 2-332           Change 1 DISCONNECT WIRE 27F AT THE WAIT-TO-START LAMP. WITH THE ROTARY SWITCH IN THE “RUN” POSITION, DO YOU HAVE BATTERY VOLTAGE AT WIRE 27F? DISCONNECT PCB/DISTRIBUTION BOX ENGINE CONNECTOR, BODY CONNECTOR & WIRE 571A AT THE WAIT-TO-START LAMP. DO YOU HAVE CONTINUITY BETWEEN WIRE 571A & SOCKET E ON THE BODY CONNECTOR HARNESS? POWER AVAILABLE TO       GAUGES WAIT-TO-START LAMP      DOESN'T COME ON WAIT-TO-START LAMP PCB/DISTRIBUTION BOX GLOWPLUG   CONTROLLER WIRING   NOTE: NO GLOWPLUG   CONTROLLER WITH   DISTRIBUTION BOX POWER AVAILABLE TO      LAMP LAMP HAS GROUND REPAIR 27F or REPLACE HARNESS REPAIR 571A or REPLACE HARNESS PCB, GO TO C4, Page 2-334 C FROM 3, Page 2-320 C1 C2 C3 WAIT-TO-START LAMP PCB/DISTRIBUTION BOX GLOWPLUG     CONTROLLER WIRING WAIT-TO-START LAMP PCB/DISTRIBUTION BOX GLOWPLUG     CONTROLLER WIRING 1. STE/ICE-R TEST 89 (Page 2-750) 2. MULTIMETER 1. STE/ICE-R TEST 91 (Page 2-752) 2. MULTIMETER 1. STE/ICE-R TEST 91 (Page 2-752) 2. MULTIMETER (RESISTANCE) You know power is available at the wire junction. Now you need to know if it is reaching the gauge. The ground circuit for the lamp goes through this wire and the PCB/distribution box. You need to make sure the lamp can light. CONNECT RED LEAD OF STE/ICE-R OR MULTIMETER TO LEAD WIRE 27 OF THE WAIT-TO- START LAMP AND CONNECT THE BLACK LEAD TO WIRE 571 LEAD OF THE LAMP. DOES THE LAMP GLOW DIMLY? DIAGNOSTIC FLOWCHART INSTRUMENTS CIRCUIT TM 9-2320-280-20-1 DISTRIBUTION BOX, GO TO C7, Page 2-336