TM-9-2320-365-20-1

M1078 SERIES, 2 1/2-TON, 4 X 4, LIGHT MEDIUM TACTICAL VEHICLES (LMTV)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; UNIT MAINTENANCE; VOLUME NO. 1 OF 5

FEBRUARY 2006

CHANGE 3

TM-9-2320-365-20-1 - Page 1424 of 1760

TM 9-2320-365-20-1

e88.

PTO DOES NOT OPERATE (CONT)

KNOWN INFO

TEST OPTIONS

YES

REASON FOR QUESTION

NO

Replace WTEC III relay

K37 (para 7-9).

Replace WTEC III transmission

ECU (para 8-7).

21.

WARNING

Read WARNING

on following page.

Voltage Test or

STE/ICE-R Test #89

Is 24 VDC present on WTEC

III relay K37 terminal 86?

2-1008

Change 2

POSSIBLE PROBLEMS

If 24 VDC is not present,

WTEC III transmission ECU is

faulty.

If 24 VDC is present,

WTEC III relay K37 is faulty.

Faulty WTEC III relay K37.

Faulty WTEC III transmission

ECU.

Circuit breaker OK.

Vehicle starts.

PTO OK.

PTO cable assembly OK.

Auxiliary panel cable assembly

OK.

PTO switch OK.

WTEC III dashboard cable

assembly OK.