TM 9-2320-387-24-l
GLOW PLUGS CIRCUIT
DIAGNOSTIC FLOWCHART
I
KNOWN INFO
I
GLOW PLUG CURRENT OK
NOT CYCLING PROPERLY
KNOWN INFO
I
SLOW PLUG CURRENT OK
SLOW PLUGS NOT
CYCLING
SLOW PLUGS DRAW
CURRENT WITH
CONTROLLER
DISCONNECTED
POSSIBLE
PROBLEMS
WIRING SHORT
PCB (GLOW PLUG POWER
RELAY)
1
Bl
[
-
TEST OPTIONS
TURN ROTARY SWITCH TO STOP.
1. STE/lCE-R TEST 80
(Page 2-505)
DISCONNECT GLOW
PLUG CONTROLLER. TURN
ROTARY SWITCH TO RUN. DO
GLOW PLUGS STILL DRAW
CURRENT?
2. MULTlMElER
REASON FOR QUESTION
If the glow plug controller is
shorted, the glow plug power relay
&GE9
in the PCB will always be closed-
MEASURE VOLTAGE AT SOCKET
6 OF GLOW PLUG CONTROLLER
CONNECTOR HARNESS. IS
THERE BATTERY VOLTAGE AT
THIS SOCKET?
r OPTIONS
1. STEXE-R
TEST 89
(Page 2-508)
2. MULTIMETER
REASON FOR QUESTION
If there is a short in the
harness, this wire will have
battery voltage.
I
SHORT IN ENGINE CONNECTOR
HARNESS. REPAIR OR REPLACE
HARNESS.
-
2-296
