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TM 11-5820-890-20-2
2-12
2.2.
TROUBLESHOOTING FLOWCHARTS. Continued
CHART 1
VEHICLE MASTER CIRCUIT BREAKER TRIPS WHEN SET TO ON.
(Sheet 1 of 12)
A
D
B
C
E
F
K
S
U
T
L
H
M
V
R
P
VAA/PSA P1
N
J
1. SET MASTER CIRCUIT BREAKER TO OFF.
2. CONNECT MB POWER CABLE TO VEHICLE
POWER SOURCE.
3. REMOVE VAA OR PSA FROM MB.
4. CHECK CONTINUITY AT VAA OR PSA P1, PIN
B TO PIN A (GND).
NO
YES
SHORT
TO GROUND
?
REPLACE VAA OR PSA.
1. DISCONNECT MB POWER CABLE FROM
VEHICLE POWER SOURCE.
2. SET MASTER CIRCUIT BREAKER TO ON.
NO
YES
CIRCUIT
BREAKER
TRIPS
?
PROBLEM WITH VEHICLE
WIRING, CONTACT VEHICLE
MAINTENANCE.
NO
YES
CX 13417
PRESENT
?
1
SH 2
2
SH 8
START
NOTE:
Master circuit breaker in this case applies
to that power circuit that supplies power
to intercomm/communications system.
This circuit is identified in vehicle
instructions.
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