TM-9-2320-280-20-1
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 1 OF 3
JANUARY 1996
TM-9-2320-280-20-1 - Page 370 of 888
TM 9-2320-280-20-1
KNOWN INFO
POSSIBLE PROBLEMS
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
2-276
Change 1
STARTER CIRCUIT
C
FROM
5,
Page 2-266
C1
DISCONNECT NEGATIVE BATTERY
CABLE TO STOP CRANKING.
ENGINE WON'T STOP
CRANKING
ROTARY SWITCH
PCB/DISTRIBUTION BOX
WIRING
STARTER
C2
DISCONNECT WIRES AT ROTARY
SWITCH. WITH SWITCH IN “OFF”
POSITION,
DO YOU GET:
OPEN CIRCUIT FROM B TO S?
OPEN CIRCUIT FROM B TO R?
OPEN CIRCUIT FROM R TO S?
1. STE/ICE-R TEST 91
(Page 2-752)
2. MULTIMETER
REPLACE
SWITCH
C3
WITH ROTARY SWITCH IN “RUN”
POSITION, DO YOU GET:
OPEN CIRCUIT FROM B TO S?
OPEN CIRCUIT FROM R TO S?
SHORT CIRCUIT FROM B TO R?
1. STE/ICE-R TEST 91
(Page 2-752)
2. MULTIMETER
A good switch has these opens
and shorts.
REPLACE
SWITCH
GO TO C4,
Page 2-278
ENGINE WON'T STOP
CRANKING
ROTARY SWITCH
PCB/DISTRIBUTION BOX
WIRING
STARTER
ROTARY SWITCH
PCB/DISTRIBUTION BOX
WIRING
STARTER
ENGINE WON'T STOP
CRANKING
No matter what's wrong, the
starter can't crank without battery
power.
A good switch exhibits these
open circuits in the “OFF”
position.
DIAGNOSTIC FLOWCHART
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