WATER TEMP WARNING LIGHT OR BELL NOT OPERATING PROPERLY

TM 9-2320-285-24-1

2-19.

INSTRUMENT PANEL TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. WATER LEVEL WARNING LIGHT AND BELL NOT OPERATING PROPERLY (Cont)

Step 6.

Disconnect electrical leads from water level sensor (para 2-29).

With engine stopped, use an ohmmeter to check continuity of water level sensor.

Then check continuity with engine running.

a. If continuity is not obtained with engine shut down, or continuity is obtained with engine running,

replace water level sensor (para 2-29).

b. If continuity is obtained with engine shut down and continuity is not obtained with engine running,

water level sensor is operating correctly.

2. WATER TEMP WARNING LIGHT OR BELL NOT OPERATING PROPERLY

Step 1.

Disconnect oil pressure sensor electrical lead (para 2-32a).

Disconnect water level sensor electrical leads (para 2-29).

Connect jumper lead to water temperature sensor terminal and to ground.

With engine stopped, turn key switch to on position.

WATER TEMP warning lamp should light and warning 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 OIL PRESSURE warning lamps light, go to

step 4 below.

Step 2.

Check for continuity of WATER TEMP 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(1)).

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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