TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
3.
ENGINE HIGH IDLE DOES NOT OPERATE (MODEL A ONLY) (continued).
TEST OPTIONS
KNOWN INFO
15.
Engine high idle operates
Is there continuity
Continuity Test.
from cab switch.
between the cab control
REASON FOR QUESTION
Engine high idle does not
box connctor (J2), posi-
operate from either RH or
tion "R," and the supply
Power is transferred from
LH remote locations.
harness connector (J1),
the (24-pin) linking har-
Remote control unit OK.
position "F"?
ness to the cab portion of
Remote control cable OK.
the high idle circuit
Supply voltage from cab
through the cab control
control box OK.
box. An open circuit in
Junction box harness OK.
the control box will pre-
vent high idle operation
POSSIBLE PROBLEMS
from the remote control
unit.
Cab control box wiring
faulty.
Repair cab
control box
NO
Fault not corrected.
YES
Notify supervisor.
Change 1
4-74
