TM 5-3805-254-20-1
ELECTRICAL SYSTEM - CONTINUED
TURN SIGNAL SWITCH
Lever actuated switch that directs current flow to illuminate left or right side signal light filaments in taillights and parking
lights.
SIGNAL FLASHER
Current is supplied by turn signal switch to a heating coil, bi-metallic strip contact points and signal light filaments of
taillights and parking lights. The heating coil heats the bi-metallic strip, causing it to bend, touching contact points and
illuminating signal lights. The closed contact points allow the heating coil to cool, causing the bi-metallic strips to contract,
pulling contact points open, shutting off signal lights. This sequence of events is repeated several times each second.
BRAKE LIGHT SWITCHES (Two)
Depressing brake pedal increases air pressure in air manifold. Increased air pressure pushes on pin inside brake light
switch, closing contact points, allowing current to flow to brake light filaments in taillights.
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