Operation CHARM: Car repair manuals for everyone.

General Information

BASIC KNOWLEDGE REQUIRED
Before using this section, it is important that you have a basic knowledge of the following items. Without this basic knowledge, it will be difficult to use the diagnostic procedures contained in this section.

Basic Electrical Circuits
- You should understand the basic theory of electricity and know the meaning of voltage (volts), current (amperes) and resistance (ohms).
- You should understand what happens in a circuit with an open or shorted wire.
- You should be able to read and understand a wiring diagram.

Use Of Circuit Testing Tools
- You should be familiar with the high impedance Digital Multimeter (DMM) J 39200 (or equivalent) and be familiar with the meter controls and how to use them correctly.
- You should be able to measure voltage, resistance end current.
- You should also know how to use jumper wires to bypass components and test circuits.