TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
3.
ENGINE HIGH IDLE DOES NOT OPERATE (MODEL A ONLY) (continued).
TEST OPTIONS
14.
KNOWN INFO
Is there continuity
Continuity Test.
Engine high idle operates
between the main
from cab switch.
REASON FOR QUESTION
junction box connector
Engine high idle does not
(J4) and the junction
operate from either RH or
Power source and ground
box terminal strip?
LH remote locations.
circuit are transferred
Remote control unit OK.
from the (24-pin) linking
Remote control cable OK.
harness to the terminal
Supply voltage from cab
strip in the main junction
control box OK.
box by this wiring
Main linking harness OK.
harness. If the junction
box harness is defective,
POSSIBLE PROBLEMS
the power and ground
Junction box harness
cannot reach the remote
faulty.
control connector
Cab control box wiring
locations.
faulty.
Replace junction
NO
box wire harness
YES
Change 1
4-72
