TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
3.
ENGINE HIGH IDLE DOES NOT OPERATE (MODEL B ONLY) (continued).
CABDIGITAL
CONTROL BOX
CONTINUITY TEST
CAUTION
J1
Electrical power must be shut off
P1
from circuit before continuity can
be checked. Failure to comply with
this caution may result in damage
to test equipment or electrical sys-
tem.
(1) Remove eight screws and flatwashers
from cab digital control box and
remove cab interface wiring harness
connector (P1) from cab digital control
box (J1).
(2) Remove six screws from console cover
and loosen cover to gain access to the
back of high idle switch.
(3) Disconnect cab interface wiring
LEAD
1843
harness from back of high idle switch.
(4) Set multimeter to ohms position.
NOTE
A reading of infinity indicates an
open circuit.
HIGHIDLE
SWITCH
(5) Connect multimeter between cab
interface wiring harness (J2), position
J3
"8" and lead 1843 from high idle
switch. Check multimeter for
continuity.
(6) Connect multimeter between (P2),
position "8" and (J3), position "8".
Check multimeter for continuity.
J2
POSITION
8
POSITION
8
Change 1
4-4475
7- . 9
