Door Triggers / False Alarm / Diode Wiring

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cericthered

Member - Posts: 15

Joined: October 07, 2002

Location: United States

Posted: October 24, 2002 at 10:37 PM / IP Logged

I am wiring up a Viper 550esp to a 2001 Mustang 3.8L coupe.

I am running into the common problem of the 30 minute false alarm being set off by the GEM in the car shutting down the power to all the lights, thereby triggering the door alarm.

I have diode isolated both driver and passenger trigger wires, so i don't know what is wrong? Which end does the cathode supposed to face in this situation? Anyone have a wiring diagram for this specific situation?

The door trigger wires are (-). The alarm provides both a (+) and a (-) wire for the door triggers, and i know i am using the (-).

Thanks for any help.

lalur

Member - Posts: 27

Joined: September 06, 2002

Location: United States

Posted: October 24, 2002 at 10:59 PM / IP Logged

whats up man the best thing to do is add a islation relay and u also want to cut the trunk wire and in sert a diode

any help ask

cericthered

Member - Posts: 15

Joined: October 07, 2002

Location: United States

Posted: October 25, 2002 at 12:04 AM / IP Logged

What is an isolation relay?

I have not even hooked up the trunk wire yet, so i know that is not causing the problem.

Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: October 25, 2002 at 12:42 AM / IP Logged

What amperage diodes did you use for the doors ?

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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cericthered

Member - Posts: 15

Joined: October 07, 2002

Location: United States

Posted: October 25, 2002 at 10:16 AM / IP Logged

I used the following: IN4004 , Forward Current: 1 Amp , Reverse current 30mA

Velocity Motors

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Joined: March 08, 2002

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Posted: October 25, 2002 at 10:33 AM / IP Logged

Band facing the door triggers? Wire another 1 amp in parallel and this should solve your problem.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

cericthered

Member - Posts: 15

Joined: October 07, 2002

Location: United States

Posted: October 25, 2002 at 10:59 AM / IP Logged

Yes, i put the bands facing the doors.

So I should put two diodes in parallel? (vs series) Is this what is termed "double diode isolate" ?

I wonder why the wiring instructions didn't tell me to double isolate each trigger wire. Am i using the right diodes?

Velocity Motors

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Location: Manitoba, Canada

Posted: October 25, 2002 at 11:54 AM / IP Logged

You are using the right diodes, but sometimes the amperage is not enough and you still get trace currents going to the BCM that controls the door trigger. Try this and post your results. Fords have always beena trouble vehicle for most installers witht he GEM, PATS and other items that they seem to throw installers way.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

Big Dog

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Joined: May 02, 2002

Location: Quebec, Canada

Posted: October 25, 2002 at 1:42 PM / IP Logged

Hey cericthered,

First of all you need two diodes per door. Twist the band sides of the diodes together then CUT the pin switch wire from the door and put one diode inline with the band facing the door and connect the Green trigger input of the alarm to the black side of the second diode. Do the same for the other door and again the same for the trunk switch.

There is another method using a relay but try the diodes first. Door Triggers / False Alarm / Diode Wiring -- posted image.

Prepare your future. It wasn't the lack of stones that killed the stone age.

cericthered

Member - Posts: 15

Joined: October 07, 2002

Location: United States

Posted: October 25, 2002 at 1:44 PM / IP Logged

I am doing a test on one door as i type...so i'll post how it goes later on...

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