CAR ALARM AND REMOTE START INSTALLATION GUIDE
Copyrght 2002-2004 Triple S Customs 30
INTRODUCTION TO RESISTORS:
• A resistor is an electrical component designed to have a specific resistance (or opposition) to the flow of
electrons, measured in ohms (Ω).
• When installing a remote start or security system, resistors of a specific resistance may be needed to
interface with the vehicle’s circuits. Some of a vehicle’s circuits may require a reduced voltage to operate a
specific accessory or function. A resistor can be added to reduce the trigger voltage to the circuit. Resistors
will not be required on most installations, but will be required for installations on many newer vehicles. For
example, on a 2002 Dodge Intrepid, a positive pulse through a 2700-Ohm resistor to the door lock wire will
lock the doors. If resistors are not included with the system you purchased, they can be found at almost any
electronics parts store such as Radio Shack.
• Carbon-film resistors are the type most commonly used in vehicle security and convenience applications.
Color bands on the resistor will indicate the value in ohms as well as its tolerance in a plus or minus
percentage of accuracy. Resistors also have a watt rating to indicate the amount of power it can handle. If you
exceed the power rating of a resistor, it will overheat and burn.
Symbol used in wiring schematics to indicate a resistor:
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