TB 9-2320-279-13&P-4
0024
5. Set PTO ENGAGE switch to OFF position. (WP 0015)
6. Shut OFF engine (refer to TM 9-2320-279-10).
CONDITION/INDICATION
Are 22 to 28 vdc measured between wires 1516A and 145 at high idle active relay R10 connector, terminals 86
and 85?
DECISION
No - Test 29 - Is continuity measured on wire 145 between high idle active relay R10 connector, terminal 85 and
TCM connector MC150, terminal 45?
Yes - Test 31 - Is continuity measured on wire 451 between high idle active relay R10, terminal 30 and engine
harness connector MC20, terminal E1?
TEST 29 - Is continuity measured on wire 145 between high idle active relay R10 connector, terminal 85 and
TCM connector MC150, terminal 45?
WARNING
Ensure electrical power is off prior to working on all electrical connections. Failure to comply
may result in injury or death to personnel.
Remove all jewelry such as rings, ID tags, bracelets, etc. prior to working on or around
vehicle. Jewelry and tools can catch on equipment, contact positive electrical circuits, and
cause a direct short, severe burns, or electrical shock. Failure to comply may result in injury
or death to personnel.
WARNING
Circuit breakers No. 4, 5, 6, and 10 are always electrically live. Use care when working
around these circuit breakers. Failure to comply may result in injury or death to personnel.
1. Disconnect cab harness connector MC150.
2. Connect positive (+) probe of multimeter to wire 145 at high idle active relay R10 connector, terminal 85. Refer
to schematics.
3. Connect negative (-) probe of multimeter to wire 145 at transmission control module harness connector MC150,
terminal 45.
0024-38
