TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
7.
HOURMETER DOES NOT OPERATE (MODEL A ONLY) (continued).
5.
KNOWN INFO
TEST OPTIONS
No voltage at junction
Is there continuity
Continuity Test.
box terminal strip.
between the main
REASON FOR QUESTION
Cab control box OK.
junction box connector
Linking harness OK.
(J4) and the junction box
The power source for the
terminal strip, position
hourmeter is transferred
POSSIBLE PROBLEMS
25?
from the (24-pin) linking
Junction box harness
harness to the terminal
faulty.
strip in the main junction
box by this wire harness.
Replace junction box
wire harness (para 4-
NO
Fault not corrected.
Notify supervisor.
YES
4-128
Change 1
8
