TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
3.
ENGINE HIGH IDLE DOES NOT OPERATE (MODEL A ONLY) (continued).
CONTINUITY TEST
CAUTION
Electrical power must be shut off
from circuit before continuity can
be checked. Failure to comply with
this caution may result in damage
CAB CONTROL BOX
to test equipment or electrical sys-
CONNECTOR (J2)
tem.
SUPPLY
HARNESS
(1) Disconnect supply harness and cab
CONNECTOR
control box connectors from cab
(J1)
control box.
(2) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
(3) Connect multimeter between cab
control box connector (J2), position
"R," and supply harness connector
(J1), position "F." Check multimeter
for continuity.
CAB CONTROL BOX
CONNECTOR (P2)
NOTE
Any reading besides infinity indi-
cates a grounded wire.
(4) Remove multimeter lead from one
SUPPLY HARNESS
terminal and connect to chassis
CONNECTOR (P1)
ground.
4-4471
7- . 5
Change 1
