TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
10. NO TRANSIT LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
KNOWN INFO
5.
TEST OPTIONS
NO TRANSIT WHEN LIT
indicator light never
Are 2228 volts
Voltage Test.
comes on.
measured at main
REASON FOR QUESTION
NO TRANSIT WHEN LIT
junction box terminal
indicator bulb OK.
strip, position 11?
Power measured at the
Hook arm down proximity
terminal strip indicates
switch adjustment OK.
that the hook arm down
Hook arm down proximity
proximity switch is
switch LED on.
functioning and sending
POSSIBLE PROBLEMS
signal voltage to the cab
control box.
Hook arm down proximity
switch faulty.
Cab control box faulty.
Linking wire harness
faulty.
Replace hook
Main junction box
arm down
harness faulty.
NO
proximity switch
Relay no. K3 faulty.
YES
4-174
Change 1
