WATER TEMP WARNING LIGHT OR BELL NOT OPERATING PROPERLY (Cont)

TM 9-2320-285-24-1

2-19.

INSTRUMENT PANEL TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. WATER TEMP WARNING LIGHT OR BELL NOT OPERATING PROPERLY (Cont)

Step 4.

Check continuity of diodes (para 2-35f) and brown/red electrical lead connecting diodes and bell.

a. If correct continuity is not obtained, replace diodes (para 2-35f) or repair wiring (para 2-35c(2)).

b. If correct continuity is obtained, go to step 5 below.

Step 5.

Check continuity of wiring connecting diodes and water temperature sensor.

a. If continuity is not obtained, repair or replace wiring (para 2-32c).

b. If continuity is obtained, troubleshoot water temperature sensor (para 2-21).

3. OIL PRESSURE WARNING LIGHT OR BELL NOT OPERATING PROPERLY

Step 1.

Disconnect water level sensor (para 2-29).

With engine stopped, turn key switch to on position.

OIL PRESSURE warning lamp should light and bell should sound.

a. If lamp does not light, go to step 2 below.

b. If bell does not sound, go to step 3 below.

c. If lamp lights, bell sounds, and WATER LEVEL or WATER TEMP warning lamps light, go to step

4 below.

Step 2.

Check for continuity of OIL PRESSURE warning light bulb.

a. If bulb is defective, replace (para 2-26b(4)).

b. If bulb is not defective, repair socket and wiring as required (para 2-26b(4)).

Step 3.

Disconnect warning bell electrical leads (para 2-26c(l)).

Connect 12 Vdc power source to bell.

Bell should sound.

a. If bell does not sound, replace (para 2-26c(1)).

b. If bell sounds, go to step 4 below.

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