TM 9-2320-387-24-l
INSTRUMENTS CIRCUIT
DIAGNOSTIC FLOWCHART
fi9
TESTOPnONS
I
1
r
POWER AVAIlABLE
TO
WAIT-TO-START LAMP
DOESN’T COME ON
1. STE/ICE-R TEST 69
(Page 2-506)
2. MtJLTlMETER
DISCONNECT WIRE 27F AT THE
WAIT-TO-START LAMP. WITH THE
ROTARY SWITCH IN THE RUN
POSITION, DO YOU HAVE
BAl-t-ERY VOLTAGE AT WIRE 27F?
1 POSSIBLE
PROBLEMS
REASON FOR QUESTION
You know power is available at
the wire junction. Now you need
to know if it is reaching the
gauge.
WAIT-TO-START LAMP
PCB
GLOW PLUG
CONTROLLER
WIRING
1 TEST OPTlONS
DISCONNECT PCB ENGINE
CONNECTOR, BODY CONNECTOR
& WIRE 571A AT THE WAIT-TO-
START LAMP. DO YOU HAVE
CONTINUITY BETWEEN WIRE
571 A & SOCKET E ON THE BODY
CONNECTOR HARNESS?
1. St-EXE-R
TEST 91
(Page 2-506)
2. MULTIMETER
REASON FOR QUESTION
The ground circuit for the lamp
goes through this wire and the
PCB.
POSSIBLE
PROBLEMS
WAIT-TO-START LAMP
PCB
GLOW PLUG
CONTROLLER
WIRING
1
I TEST OPTIONS
LAMP HAS GROUND
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?
1. STEXE-R
TEST 91
(Page 2-606)
2. MULTIMETER
(RESISTANCE)
REASON FOR QUESTION
You need to make sure the lamp
can light.
POSSIBLE
PROBLEMS
1
WAIT-TO-START LAMP
PCB
GLOW PLUG
CONTROLLER
WIRING
--
2-318
