TM-9-2320-283-20-1

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3

DECEMBER 1983

TM-9-2320-283-20-1 - Page 155 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING

2-9. GENERAL (Continued).

NOTE

• The

following list of

circuit colors and abbreviations are used in the troubleshooting schematics found in

paragraph 2-11.

White

WH

Yellow

YL

Light Blue

LB

Tan

TN

Red

RD

Light Green

LG

Dark Blue

DB

Brown

BR

Pink

PK

Dark Green

DG

Purple

PP

Gray

GY

Orange

OR

Black

BK

• The following symbols shown

below are used throughout the troubleshooting procedures.

They are

listed here as reference

only.

Additional

symbols are used in specific procedures and labeled as

required.

i. In the following troubleshooting procedures you will be asked to

test for certain voltage measurements.

The word

nominal will follow a voltage measurement where an exact voltage reading is not important.

In these cases a close voltage

reading will be considered normal.

For example, 10.5 volts dc would be acceptable if measuring for 12-volts dc nominal.

However, 10.5 volts dc would not be acceptable if only measuring for 12-volts dc.

Remember, a nominal measurement

means an approximate measurement.

2-30