TM-9-2320-366-20-1
M1083 SERIES, 5 TON, 6x6, MEDIUM TACTICAL VEHICLES (MTV)
TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; UNIT MAINTENANCE; VOLUME NO. 1 OF 5
FEBRUARY 2006
CHANGE 3
TM-9-2320-366-20-1 - Page 1244 of 1824
e55. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)
TM 9-2320-366-20-1
2-690
Change 1
KNOWN INFO
11.
POSSIBLE PROBLEMS
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.
REVERSE WARNING Relay
Replacement Test
REASON FOR QUESTION
TEST OPTIONS
NO
Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
Backup light assembly OK.
WTEC II transmission controls.
WTEC II cab transmission
harness OK.
WTEC II dashboard cable
assembly OK.
Rear lights cable assembly
OK.
YES
Replace REVERSE WARNING
relay in WTEC II VIM (para 8-6).
If backup lights operate
with new REVERSE
WARNING relay installed,
REVERSE WARNING relay
is faulty.
If backup lights
do not operate with new
REVERSE WARNING relay
installed, WTEC II TEPSS
is faulty.
Replace WTEC II
TEPSS (para 8-2).
Do backup lights operate
with new REVERSE
WARNING relay installed in
WTEC II VIM?
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