1. Verify the problem. Operate the complete system and list all symptoms as follows: • Check the accuracy and completeness of the complaint. • Learn…

CAUTION: To prevent damage to the test meter, only use the ohmmeter on circuits when the power is OFF. Power from 12 V systems may…

An ammeter measures current flow (amperage) in a circuit. Amperes (or amps) are units of electron flow that indicate how many electrons are passing through…

Use a voltmeter to answer the following questions: • Does the circuit have voltage? • What is the voltage reading? • What is the voltage…

Jumper wires allow a circuit to by-pass a suspected opening or break in a circuit. Use a jumper wire to check for open relay contacts,…

Test meters come in a variety of models. Any working model will be adequate for simple tests. However, accurate readings are important. Make sure the…

Ohm’s Law describes the relationship between current, voltage, and resistance in an electrical circuit. Ohm’s Law also provides the basic formula for calculations. Memorize the…

Voltage is electrical pressure or force that pushes current through a circuit. The pressure is measured in volts. The symbol V (for example, 12 V)…

The UV leak detection kit is used with fuel dye to quickly identify leaks. The fuel dye combines with fuel and migrates out at the…

The Crankcase Pressure Test Adapter is used to measure combustion gas flow from the engine breather and may be used with the magnehelic gauge or…