Variable Resistors

2 of 24

RESISTORS
All electrical circuits require resistance to operate correctly. Resistors are sometimes added to an electrical circuit to limit current flow, create voltage drops, or provide different operating modes. All resistors are rated in both a fixed ohm value of resistance and a power rating in watts. (Watt = Volts X Amps)

Three basic categories of resistors are used in automotive electrical systems:

1. Fixed;

2. Stepped or tapped;

3. Variable.

Each has different characteristics and usage ranging from a simple fan circuit to a completed computer circuit.