Checking Switches

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In a circuit diagram, a switch is shown in the idle state.

Normally open or normally closed switch
Switches are classified into those which open the circuit and those which close the circuit when off.

Switches are shown in illustration in their normal state unless specified otherwise.

Fig 1: Identifying Normally Open/Closed Switch
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Switch connection

This figure illustrates a complex switch. The continuity between terminals at each position is as indicated in the table below.

SWITCH POSITION	TESTER CONNECTION	SPECIFIED CONDITION
OFF	-	-
1st stage	1-5-6	Continuity
2nd stage	1-4-6	Continuity
3rd stage	1-3-6	Continuity
4th stage	1-2-6	Continuity

Fig 2: Identifying Switch Connection

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.