2000 ford f150 false alarm problem

Have you tried disconnecting it?Sylvain Rochon

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Since you're using the positive door input, I would use a relay and make the door trigger input rest at ground.  

85= Ground86= Vehicules door trigger output87= +12v87a= Ground30= Door trigger input from alarmIf there's a fast pulse that comes on the line, it would probably be too weak to trigger the relays coil on a 30amp bosh unit.

Sylvain Rochon

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u are problably getting s trigger when the doortrigger goes  to sleep, after like 15 minutes or so the bcm shuts down everything that is not esential to the car, u might have to go directy to the door latch triggers.  i seem to remember i had the same problem with the explorer.rocker

on my 2000 f150 i went right on the dome light in the headlinerIf i Can't Install it    I Don't need it   Joe

yeah, it black blue positive, find the latch triggers on each door, like i said probably the bcm is shutting down the cars electrical system and that is why it is falsing, u know it being a while but i think we used a relay to solve the problem, try this hook up 85 and 87a toghether and hook this up to the black blue of car, know hook up 30 to your alarm positive trigger, and 86 to ground, i think this is how we solve the problem if not u need to go to each latch trigger of the doors and they are negatve polarity. good luck!rocker

yes i beleive the wire was BLACK/ lt blue its been about 5 years since i installed itIf i Can't Install it    I Don't need it   Joe

Guys... like I said the door trigger is not connected at all and still alarm going off like every 40 min. and the icon on remote shows that door opened...

I don't believe that wiring your door trigger to this relay will do it, after analysing your relay, your alarm will never see the door trigger thus solving the problem but the alarm will never see the doors open cause pin 87 is left without any connection.  I would wire it as follow:  85 & 87a to ground, 86 to BLACK/ blue (+), 87 to +12v and 30 to door trigger input of your alarm.  That way, if your bcm monitors before shut down, the pulse shouldn't be triggering the relays coil and your door trigger input will remain at ground not tripping the alarm but if someone opens the door, the relay will trip letting 12v thru pin 30 tripping the alarm....that's my point of view...but I do believe that going to each door pins while isolating with diodes will give you best results.Sylvain Rochon

MECP security specialist

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26 Years of experience counts

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