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2006 Ford E-250, Door Trigger Problems

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=146363
Printed Date: March 29, 2024 at 8:19 AM


Topic: 2006 Ford E-250, Door Trigger Problems

Posted By: berad
Subject: 2006 Ford E-250, Door Trigger Problems
Date Posted: July 28, 2020 at 4:29 PM

I'm installing a viper 5305v alarm/starter in my e250.
The problem I am having is that the negative door triggers are 12v when the door is closed, but after about 30 seconds the signal drops to 0.6v thus triggering the alarm through the (-) door trigger input.

Is there anything I can do aside from having to use the done light?



Replies:

Posted By: berad
Date Posted: July 28, 2020 at 5:20 PM
Fyi.   I tapped into the 3 door pin wires in the driver's kick panel and isolated them with diodes.




Posted By: geepherder
Date Posted: July 28, 2020 at 6:28 PM
If you only put 3 diodes, that's your problem. You need 3 more to isolate from the BCM:

posted_image

Found in this old post:

https://www.the12volt.com/installbay/forum_posts.asp?tid=145516

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My ex once told me I have a perfect face for radio.




Posted By: davep.
Date Posted: July 30, 2020 at 4:02 AM
There's a DEI bulletin regarding the Ford N.O. door triggers that shows the use of 10K pull-up resistors to keep the door triggers high until the door opens. Put a 10K resistor in parallel with each diode in the alarm group, one side of the resistor to +12V at all times.




Posted By: eguru
Date Posted: July 30, 2020 at 6:39 AM
Do you mean a single 10K resistor between 12V and the alarm's door trigger input wire?




Posted By: davep.
Date Posted: July 31, 2020 at 11:49 PM
I found, in the link below, what I was thinking of, but the description says "rests at ground when closed, and goes high when open. May not be exactly what is needed for the Ford doors which rest 'open' when door closed, but ground when door open. Perhaps a single 10k resistor to hold the alarm trigger input high such as eguru suggests, would work. May have to experiment.

I found the tech tip in the downloads section. NOTE: It says the diagram shown must be repeated for each door.
https://www.the12volt.com/installbay/file.asp?ID=1121

Well, I give up. I can NOT get the individual file I want to link. All the link does is open the downloads page.
For "Browse by Category" select Tech Tips-Car Security. For "Enter a Search Term" enter "door triggers". There are several. #5 and #6 pdf's are what I'm thinking of.




Posted By: kreg357
Date Posted: August 01, 2020 at 7:23 AM
Think I found it, davep!

Here is a link to DEI Tech Tip 1921 :   https://www.the12volt.com/installbay/file.asp?ID=930
Think this is the complete diagram for all 4 door trigger wires. Just note that the circuits output must go to the 5305's (+) Door Trigger Input.

I believe that the 2006 F250 had N.C. door triggers. They should test as Chassis Ground when the door is closed and an open when the door is not closed.

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Soldering is fun!




Posted By: i am an idiot
Date Posted: August 01, 2020 at 6:33 PM




Posted By: i am an idiot
Date Posted: August 01, 2020 at 6:34 PM




Posted By: berad
Date Posted: August 02, 2020 at 9:17 PM
I ended up just using a relay (+ constant to +momentary) off of the factory dome light relay under the dash.    Works like a charm.

Thanks for the responses.   I'll try the double isolation and resistors on the next one.





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