INDICATOR AND WARNING ELECTRICAL CIRCUITS

TM 5-2420-222-20-1

INDICATOR AND WARNING ELECTRICAL CIRCUITS

AC GENERATOR INDICATOR LIGHT

Negative terminal connected by wire to ac generator voltage regulator.

Positive terminal connected by wire to battery and ac generator output voltage through ignition lock switch ACC

terminal and 20 ampere circuit breaker, and to other indicators and light switch.

Senses electrical system current and shows when ac generator is not charging.

ENGINE OIL PRESSURE INDICATOR LIGHT

Positive terminal connected by wire to negative terminal of ac generator indicator light and positive terminal of

FUEL level gage.

Negative terminal connected by wire to positive terminal of engine oil pressure switch.

Lights up to get operator's attention when engine oil pressure switch closes due to drop in engine oil pressure

below a preset point during engine operation.

ENGINE OIL PRESSURE SWITCH

Positive terminal connected by wire to negative terminal of engine oil pressure indicator light.

Grounded through housing to flywheel housing.

Normally closed switch is kept open by oil pressure during engine operation as long as engine lubrication system

pressure is above a preset level. When engine oil pressure drops below preset level, switch closes and engine oil

pressure indicator light lights up.

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