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
6.
TEST OPTIONS
NO TRANSIT WHEN LIT
Visual inspection.
Is LED D43 in the cab
indicator light never
control box off?
REASON FOR QUESTION
comes on.
NO TRANSIT WHEN LIT
This step is a quick check
indicator bulb OK.
to determine if the
Hook arm down proximity
proximity switch signal is
switch OK.
reaching the cab control
box from the main junction
POSSIBLE PROBLEMS
box. If the circuit is
Cab control box faulty.
operating correctly, LED
Linking wire harness
D43 should be off.
faulty.
Main junction box
harness faulty.
Relay no. K3 faulty.
LED D43 on;
NO
Go to Step 13.
YES
4-176
Change 1
