TEST OPTIONS
REASON FOR QUESTION
NO
YES
Voltage Test or
STE/ICE-R Test #89
2.
WARNING
CAUTION
Read WARNING and
CAUTION on
following page.
Is 12 VDC present at
connector P87?
Go to step 3 of this fault.
Replace backup light
assembly (para 7-29).
KNOWN INFO
POSSIBLE PROBLEMS
Faulty backup light
assembly.
Faulty dashboard cable
assembly.
Faulty WTEC II cab
transmission harness.
Faulty rear lights cable
assembly.
Faulty REVERSE
WARNING relay in WTEC
II VIM.
Faulty WTEC II
transmission ECU
pushbutton shift selector.
Faulty WTEC III relay K25.
Faulty WTEC III
transmission ECU.
If 12 VDC is present, backup
light assembly is faulty.
e53. BACKUP LIGHT DOES NOT ILLUMINATE (CONT)
Circuit breaker CB70 OK.
Circuit breaker CB73 OK.
Both turn signals illuminate.
Engine starts.
Transmission reverse (R)
range OK.
Backup light lamps OK.
TM 9-2320-365-20-1
2-640 Change 1