Instrument Panel Switches and Gage Lights.

TM 10-3930-638-24&P

1. OIL PRESSURE GAGE. indicates engine oil pressure

6. HYDRAULIC FILTER INDICATOR. Illuminates

indicating hydraulic filter is clogged and requires replace-

and is electrically connected to engine oil pressure sender

ment; electrically connected to hydraulic filter switch

located on right side of engine.

located in filter head, Indicator illuminates when switch

2. FUEL GAGE. Indicates quantity of fuel in fuel tank;

closes at 20 3 PSI increasing pressure.

electrically connected to fuel level sender located on top

7. TRANSMISSION TEMPERATURE INDICATOR.

of fuel tank.

Illuminates indicating transmission is overheated;

3. ENGINE OIL PRESSURE INDICATOR. Illuminates

electrically connected to transmission temperature switch

indicating low oil pressure; electrically connected to engine

located in right side of transmission. Indicator illuminates

oil pressure switch located on right side of engine near

when switch closes at 265 degrees F.

fuel filters. Indicator illuminates when switch closes at

decreasing pressure of 8 2.5 PSI.

4. ENGINE WATER TEMPERATURE INDICATOR.

Illuminates indicating engine is overheated; electrically

NOTE

connected to engine temperature switch located in cylinder

head. Indicator illuminates when switch closes at 205

HYDRAULIC FILTER, transmission tempera-

degrees F.

ture, and engine temperature indicators will

5. ALTERNATOR INDICATOR. Illuminates indicating

illuminate when ignition switch is placed in

battery is not recharging; connected to terminal I of

LAMP TEST position.

alternator.

b. Instrument Panel Switches and Gage Lights.

Auxiliary switch controls application of power to gage

lights and brightness of these lights, and power to service

1, GAGE LIGHTS. Provide illumination of oil pressure

tail lights. Mechanical lock prevents main and auxiliary

and fuel gages; lamps are contained within these gages and

switches from applying power to lights except black out

are controlled by VEHICLE LIGHTS switch.

tail lights.

2. VEHICLE LIGHTS SWITCH. Consists of three

3. FRONT FLOOD LIGHTS SWITCH. Applies power

separate sections: main switch, auxiliary switch, and

to illuminate front flood lights.

mechanical lock. Main switch controls application of

4. REAR FLOOD LIGHTS SWITCH. Applies power

power to black out tail and stop light, stop light switch,

to illuminate rear flood lights.

service tail light, and front and rear flood light switches.

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