TM-9-2320-280-20-1

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 1 OF 3

JANUARY 1996

TM-9-2320-280-20-1 - Page 847 of 888

TM 9-2320-280-20-1

DC VOLTAGE O TO 45 VOLTS TEST #89

Description:

This procedure measures voltage in the range of

-45 to 45 volts. The VTM is used as a DC voltmeter

with the decimal point in the correct position. This

test must be done with the component being tested

turned on. Test requires the use of the TK adapters

and transducers

Typical Applications:

●

Fuel Solenoid

●

Starter Solenoid

●

Alternator Output

●

Any DC Voltage measurement

Test Procedure:

1. Connect test probe cable W2. Attach P1 to J4.

2. Connect the desired test leads to P2.

3. Set TEST SELECT switch to 89.

4. Short leads together. Press and hold TEST

button until CAL appears on display.

5. Release TEST button and wait for offset value to

appear on display.

6. If offset is within -6.8 to 6.8 proceed. If not, go to

DCA Troubleshooting Procedure.

7. Press and release TEST button. Observe

displayed value.

Pre-Test Procedures

Run Confidence Test.

Control Functions:

01,02,03,04,06

Possible Error Messages

E005 Offset not performed.

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