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TM 9-2320-364-20-2
2-1156
2. HEADLIGHTS, CLEARANCE LIGHTS, HORN, WORK LIGHTS, DIMMER, OR
BEACON LIGHT DO NOT OPERATE (CONT).
9.
Go to Step 10 of this
Fault.
NO
22 to 28 vdc register on 24
vdc voltmeter indicating
ENGINE switch is OK.
10 to 14 vdc register on 12 vdc
voltmeter indicating
batteries are OK.
Domelight operates indicating
10 to 14 vdc present on
wire 1084 at BLACKOUT
LIGHTS switch.
Wire 1189 between splice at
blackout service select
switch and 24V relay R12
OK.
Wire 1872 between ENGINE
switch and IGNITION circuit
breaker CB10 OK.
IGNITION circuit breaker
CB10 OK.
Wire 1872 between IGNITION
circuit breaker CB10 and
24V relay R12 OK.
Wire 1435 between 24V
relay R12 and ground OK.
24V relay R12 OK.
Wire 1430 OK.
Wire 1189 between 24V
relay R12 and magnetic
switch R28 OK.
Wire 1435 between magnetic
switch R28 and ground faulty.
Wire 1435 between magnetic
switch R28 and rectifier M52
faulty.
Rectifier M52 faulty.
Magnetic switch R28 faulty.
Wire 1175 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
If any vdc are not present,
magnetic switch R28 will not
operate.
WARNING
Are any vdc measured on
wire 1435 between magnetic
switch R28 and a known
good ground?
Go to Step 11 of this
Fault.
YES
Read WARNING
on Page 2-1157
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