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How-to-guides - Data bus 101 continued

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Understanding data bus signals (multiplexing) and converters

 

 

Data bus continued

 

Now that we know a little bit more about data bus technology, let's get to the fun stuff.

Making use of the data bus.

 

 

 

 

Data bus

Index               

 

Introduction

 

Data bus

Part 2

 

 

 

   

 

Life is good!

 

While it may seem more complicated than just sending a positive or negative voltage to an accessory in your car " like the good old days", it can however, really make installation of several products much easier to install.

 

This is due to the fact that several functions of a security system for example, can be accessed from one single wire, as opposed to having to find each individual wire for that function.

Functions such as:

  • Power lock.

  • Power unlock.

  • 2nd depression  drivers door unlock.

  • Park lights.

  • Horn honk.

  • Remote start.

  • Dome light.

And more, can be found on one single wire!

 

 

 

 

The catch

 

Of coarse there is one catch.

 

You will have to have a data bus converter that can be purchased at your local audio shop or online.

 

We use Flash logic however, there are several out there that do the same thing.

 

In this example, we are assuming you are installing a security system.

 

This devise is an electronic circuit that incorporates several wires on one side of the  unit to your security system, for connecting the functions you require.

 

The other side will have a single wire going to your vehicles "data bus" line.

 

 

 

See Car Stereo and Security Wiring Diagrams, for vehicle specific data bus wiring information, such as, vehicle data bus line wire color, function and resistor value.

 

 

 

 

 

Worth the extra cost?

 

This device is great to have and worth the extra cost, especially for the newbie installer, as it takes most of the guess work out of locating and deciphering the who, what, where and why of locating all the different wires to each function.

 

"Anyone who has ever installed an electronic accessory on an automobile knows all the "fun" it can be to find and determine wire function for a specific feature".

 

 

 

 

 

Return to: Data bus 101

 

 

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