TB-9-2320-279-13-P-4

TRUCK, TRACTOR, LIGHT EQUIPMENT TRANSPORTER (LET), 8X8, M983A2 LET

TECHNICAL BULLETIN; OPERATOR AND FIELD LEVEL

APRIL 2008

TB-9-2320-279-13-P-4 - Page 248 of 744

ENGINE

COMPARTMENT

ENGINE

ECM

VIH CONNECTOR

MC21

Figure 42.

2. Connect negative (-) probe of multimeter to a known good ground.

3. Multimeter should display a reading less than 200 ohms. Note reading.

CONDITION/INDICATION

Is continuity measured between wire 151–D at engine harness connector MC21, terminal B and a known good

ground?

DECISION

No - Test 40 - Can engine harness wire 150/151–D be repaired?

Yes - Test 41 - Does high idle operate after swapping high idle active relay R10 with a known good relay?

TEST 40 - Can engine harness wire 150/151–D be repaired?

WARNING

•

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.

•

Do not smoke or have open flame near batteries. Batteries may explode from a spark. Battery

acid is harmful to eyes and skin. Failure to comply may result in injury or death to personnel.

TB 9-2320-279-13&P-4

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