TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
7.
HOURMETER DOES NOT OPERATE (MODEL A ONLY) (continued).
CONTINUITY TEST
HOURMETER
HOUSING
CAUTION
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply
with this caution may result in
damage to test equipment or elec-
trical system.
(1) Remove four screws, lockwashers,
two locknuts, and hourmeter housing
from main junction box.
NOTE
Tag and mark wires before re-
moval.
(2) Disconnect wires from hourmeter.
(3) Set multimeter to ohms position.
HOURMETER
WIRE
NOTE
HARNESS
A reading of infinity indi-
cates an open circuit.
Terminal 25 is connected
to one end of the harness;
terminal 26 is connected
to the other end of the
harness.
(4) Check for continuity between
connectors on hourmeter harness
and positions 25 and 26 on terminal
strip.
WIRING REMOVED FOR CLARITY
4-123
Change 1
4
