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Door trigger, 2005 Ford F-150


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mmatrisch 
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Location: Illinois, United States
Posted: July 28, 2016 at 9:50 PM / IP Logged Link to Post Post Reply Quote mmatrisch
Hello all I'm having trouble with when I have the viper 5706v armed and I try to remote start the truck the alarm goes off saying that a door was open I have a 2005 ford f150 no extended cab just 2 seats it came with a remote to unlock the door no combo panel on door I connected the door trigger wire for alarm at the bcm
Matt
lurch228 
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Posted: July 28, 2016 at 11:22 PM / IP Logged Link to Post Post Reply Quote lurch228
Typically this happens when the BCM sends a negative pulse to the doors. You will need to wire +12v thru a 10k resistor to the alarm (-)trigger wire after the diodes to bias the alarm (-) trigger so negative pluses can't deliver ground to set off the alarm, only a constant or longer negative trigger will drain the (+)bias to ground.
The only other way is to diode isolate the BCM from the vehicle door triggers which also stops the RAP shutdown and the dome light from working.
mmatrisch 
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Joined: April 23, 2016
Location: Illinois, United States
Posted: July 28, 2016 at 11:51 PM / IP Logged Link to Post Post Reply Quote mmatrisch
I don't quite understand what your explaining are you saying after the two diaods I already have installed I need to undo after the diaod add a 1k resistor and apply 12vdc constant to the resistor sending it into to negative door trigger wire going to the viper system    is that correct. If so won't that create a direct short at the resistor
Matt
lurch228 
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Posted: July 29, 2016 at 12:09 AM / IP Logged Link to Post Post Reply Quote lurch228
You attach (ADD) the +12v 10k resistor to the end of the 2 diodes that are already attached to the alarm wire (-) door trigger. The resistance is to high to create a short. you are only adding a small amount (trickle of current) at 12v which dissipates when direct grounded by door trigger. Basically offsetting the negative pulse from the BCM that would trigger the alarm. The +12v is stopped by the diodes never making it to the vehicle side.
mmatrisch 
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Joined: April 23, 2016
Location: Illinois, United States
Posted: July 29, 2016 at 12:15 AM / IP Logged Link to Post Post Reply Quote mmatrisch
OK I understand what your saying now ok and will that deplete the battery my truck sometimes sits in the grage for a few days with out starting
And also you had said 10k on the last post and you said 1k what one did you mean
Matt
lurch228 
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Posted: July 29, 2016 at 12:21 AM / IP Logged Link to Post Post Reply Quote lurch228
Typo missed the zero and corrected it. no will not deplete you battery not enough current to even light up a 2v led
mmatrisch 
Member - Posts: 39
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Joined: April 23, 2016
Location: Illinois, United States
Posted: July 29, 2016 at 12:29 AM / IP Logged Link to Post Post Reply Quote mmatrisch
Alright awesome I will give that a shot and keep you posted with the results
Matt
lurch228 
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Posted: July 29, 2016 at 1:04 AM / IP Logged Link to Post Post Reply Quote lurch228
No problem.
mmatrisch 
Member - Posts: 39
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Joined: April 23, 2016
Location: Illinois, United States
Posted: July 29, 2016 at 3:07 PM / IP Logged Link to Post Post Reply Quote mmatrisch
ok i tried out the solution and it did not work it compleatley disabled the door sienceing on the alarm when i opened a door it did not even know i did
Matt
lurch228 
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Joined: August 08, 2012
Posted: July 29, 2016 at 4:41 PM / IP Logged Link to Post Post Reply Quote lurch228
Are you sure you got a 10k=10,000ohms resistor? Would check and make sure it is the right resistance. Let me know how you wired it. Should have only had to add the resistor to the wire/diode connection with out disconnecting the diodes you already had hooked up.
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