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
11.
TEST OPTIONS
Voltage Test.
NO TRANSIT WHEN LIT
Are there 2228 volts
indicator bulb never
measured at the cab
REASON FOR QUESTION
comes on.
control box connector
NO TRANSIT WHEN LIT
(J2), position N?
The voltage supply for the
indicator bulb OK.
hook arm down proximity
Hook arm down proximity
switch originates from the
switch OK.
cab control box. If there
No hook arm down signal
is no voltage at position
at cab control box.
N, the proximity switch
circuit will not operate.
POSSIBLE PROBLEMS
Cab control box faulty.
Linking wire harness
faulty.
Main junction box
harness faulty.
Repair cab control
NO
box (para 4-71).
YES
4-186
Change 1
