TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
3.
ENGINE HIGH IDLE DOES NOT OPERATE (MODEL A ONLY) (continued).
13.
TEST OPTIONS
KNOWN INFO
Is there continuity
Continuity Test.
Engine high idle operates
measured on the (24-pin)
from cab switch.
REASON FOR QUESTION
linking harness between
Engine high idle does not
cab control box connec-
operate from either RH or
Power source and ground
tor (P2) and main junc-
LH remote locations.
circuit are transferred
tion box connector (P4)?
Remote control unit OK.
from the cab control box
Remote control cable
to the main junction box
OK.
via the (24-pin) linking
Supply voltage from cab
harness. Faults in this
control box OK.
harness will prevent
remote control operation.
POSSIBLE PROBLEMS
Linking harness faulty.
Junction box
harness faulty.
Cab control box wiring
faulty.
Replace (24-
pin) linking
NO
harness (para
YES
Change 1
4-70
