OIL-WATER INDICATOR AND BUZZER DO NOT WORK WHEN OIL PRESSURE DROPS BELOW 8 PSI (55 KPA)-continued

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

Table 2-9.

Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

19. OIL-WATER INDICATOR AND BUZZER DO NOT WORK WHEN OIL PRESSURE DROPS BELOW

8 PSI (55 KPA) (CONT).

Step 2.

Check electrical leads at low oil pressure switch for looseness or damage.

Tighten loose connections or replace damaged connection.

Step 3.

Check for continuity throughout buzzer and light wiring.

Repair or replace defective wires or connectors.

NOTE

Disconnect wire No. 120 from terminal No. 5 on buzzer. This will remove low air pressure

circuit from buzzer.

Step 4.

Turn ENGINE switch ON. Remove wire No. 147 from low oil pressure switch and touch it

to ground.

If light and/or buzzer work, replace low oil pressure switch (para 7-84).

Step 5.

If buzzer does not work, check for 24 volts on terminal No. 7 of buzzer.

If 24 volts are not present, trace wiring and correct problem. Refer to FO-1,

Electrical Schematic.

If 24 volts are present, replace buzzer (para 7-28).

Change 6

2-134.1