How-to-guides - Understanding auxiliary outputs (trunk release) 

Security

         Index

• Introduction

• Mounting control module

• Mounting L.E.D

• Starter kill

• Power distribution

• Door pin switches

• Power door locks

• Auxiliary outputs

• Remote power window control

• Remote power sunroof control

• Remote dome light control

• Wiring park lights

• Mounting the siren

• Mounting the shock sensor

• Remote power trunk release

• Valet switch

• Relay configurations

• Final testing

Auxiliary outputs

Auxiliary output feature found on most vehicles security systems allows the remote control to control optional any electronic devices located on the vehicle, such as rolling up windows, opening sunroof, or any other device. 

This feature usually comes in the form of a single wire having a negative pulse output when a specific button is pressed on the remote.

Most the systems will have at a low current capacity on this wire, however by adding a simple relay, ( see  Understanding Relays )  you could add just about any electrical device you desire. most security systems will allow you to allocate a specific button on your remote to a specific channel or output.

Let's assume that you have four button on your remote and the security system bran has three optional outputs or three wires for each channel.

You can program a specific button to activate that output to the specified wire.

What button does what?

Some systems will also allow you to allocate what type of output signal will occur during activation of that channel.

Either a pulse output or a press and hold on until button is released. This feature creates a more desirable output as it allows for, lets say a sunroof to be opened until the button is released or for applications that only require a short pulse such as the trunk release or gas fill door to open.

Can you help me do that?

Adding an optional feature is usually as easy as finding the correct wire and proper signal to activate your particular feature.

In this case we will be adding the trunk release function to or system. Assuming you already have power trunk release on your vehicle, you should start by identifying the wire in the vehicles wiring system.

If your vehicle is not equipped with na power trunk release, you can add on to it. They are basically motorized or magnetic servos that will move the unlock mechanism of the vehicles trunk locking system. You can find these servos at most audio shop or online.

Here we go!

As with most vehicle power futures theirs usually a "common" place that you will find the wire that is required to achieve that particular objective.

With the trunk release, it can usually be fond in either the drivers or passengers kick panel.

The "kick panel" is the panel that your left foot (If on drivers side) "hangs" around when driving.

Most vehicle kick panels will snap off or will have a screw or two holding it in place.

Once you have access to the correct harness, you will want to identify the wire color and signal activation voltage. Either positive or negative.

Types of activation signals!

There are usually two different types of signals used to activate the trunk release feature.

• Positives

• Negative

What do I have?

You can verify the type of signal used for the trunk release by using a digital test light (for safety to the cars electronics) or a voltage meter)

You should begin by locating the wire that sends the specific voltage and while pressing the trunk release button on the vehicle, you will want to look for the change on you test light.

Most digital test lights will turn green if a negative voltage is present or red if a positive  voltage is present.

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