Checking Switches - Dodge Stealth 1994 Service Manual

Normal open (NO) type
OFF
Current flows
Current does not flow
Normal close (NC) type
OFF
a
Current flows
Current does not flow
HOW TO DIAGNOSE
3. Jumper wire
A jumper wire is used to close an open circuit. Never use
one to connect a power supply directly to a load.
1600227
4. Voltmeter
A voltmeter is used to measure the circuit voltage.
Normally, the positive (red lead) probe is applied to the point
of voltage measurement and the negative (black lead) probe
to the body ground.
5. Ohmmeter
An ohmmeter is used to check continuity or measure
resistance of a switch or coil. If the measuring range has
been changed, the zero point must be adjusted before
measurement.

CHECKING SWITCHES

In a circuit diagram, a switch is represented by a symbol and in
the idle state.
1. Normal open or normal close switch
Switches are classified into those which make the circuit
open and those which make the circuit closed when off.
ON
X
1