TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
5.
HAND-HELD SPOTLIGHT DOES NOT OPERATE (MODEL A ONLY) (continued).
7.
TEST OPTIONS
KNOWN INFO
Continuity Test.
Spotlight bulb OK.
Is there continuity
Worklight OK.
measured on the (24-
REASON FOR QUESTION
Supply harness OK.
pin) linking harness
Cab control box OK.
between cab control
The spotlight power
box connector (P2) and
source is transferred
POSSIBLE PROBLEMS
junction box connector
from the cab control box
(P4)?
Linking harness faulty.
to the main junction box
Main junction box
via the (24-pin) linking
harness faulty.
harness. Faults in this
Spotlight harness faulty.
harness will prevent
spotlight operation.
Replace (24-pin)
linking harness
NO
YES
4-
Change 1
4-108
