Introduction

In general, testing electrical circuits is an easy task if it is approached in a logical and organized method. Before beginning, it is important to have all available information on the system to be tested. Also, get a thorough understanding of system operation. Then you will be able to use the appropriate equipment and follow the correct test procedure.
You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring harness or electrical component to do this.

OPEN A circuit is open when there is no continuity through a section of the circuit.

SHORT There are two types of shorts.
^ SHORT CIRCUIT When a circuit contacts another circuit and causes the normal resistance to change.
^ SHORT TO GROUND When a circuit contacts a ground source and grounds the circuit.

NOTE: Refer to "How to Probe Terminal" to probe or check terminal.