TB 9-2320-279-13&P-4
0024
2.
Disconnect cab harness connector MC66.
3.
Start engine (refer to TM 9-2320-279-10).
4.
Set PTO ENGAGE switch to ON position. (WP 0015)
5.
Set heavy-duty winch control station HIGH IDLE ON/OFF switch to ON position. (WP 0015)
6.
Connect positive (+) probe of multimeter to wire 1516 at cab harness connector MC66, terminal 1. Refer to
schematics.
HARNESS CONNECTOR
JUMPER WIRE
HARNESS CONNECTOR
MC 66
CONNECTOR
MC 66
WIRE 1516
TERMINAL 1
Figure 15.
7.
Connect negative (-) probe of multimeter to a known good ground.
8.
Multimeter should display a reading between 22 and 28 vdc. Note reading.
9.
Set PTO ENGAGE switch to OFF position. (WP 0015)
10.
Shut OFF engine (refer to TM 9-2320-279-10).
CONDITION/INDICATION
Are 22 to 28 vdc measured on wire 1516 at cab harness connector MC66, terminal 1?
DECISION
No - Test 16 - Is continuity measured between heavy-duty winch valve control harness wires 1516/1849 and
1843/1854, when HIGH IDLE ON/OFF switch is in the ON position?
Yes - Test 26 - Are 22 to 28 vdc measured on wire 1516A at high idle active relay R10, terminal 86?
TEST 16 - Is continuity measured between heavy-duty winch valve control harness wires 1516/1849 and
1843/1854, when HIGH IDLE ON/OFF switch is in the ON position?
WARNING
Ensure electrical power is off prior to working on all electrical connections. Failure to comply
may result in injury or death to personnel.
