TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
10. NO TRANSIT LIGHT DOES NOT OPERATE PROPERLY (MODEL A ONLY)
(continued).
4.
KNOWN INFO
TEST OPTIONS
NO TRANSIT WHEN LIT
Visual inspection.
Is the LED on the
indicator bulb never
hook arm down
REASON FOR QUESTION
comes on.
proximity switch
NO TRANSIT indicator
illuminated?
If the LED on the hook
bulb OK.
arm down proximity
Hook arm down proximity
switch is ON, this
switch adjustment OK.
indicates that supply
voltage is reaching the
POSSIBLE PROBLEMS
switch.
Hook arm down proximity
switch faulty.
Cab control box faulty.
Linking wire harness
faulty.
Main junction box
harness faulty.
Go to Step 11.
NO
Relay no. K3 faulty.
YES
4-172
Change 1
