Problems with Ford F250 Diesel 2006 Alarm
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=80697
Printed Date: July 09, 2025 at 7:49 PM
Topic: Problems with Ford F250 Diesel 2006 Alarm
Posted By: Toxicgun
Subject: Problems with Ford F250 Diesel 2006 Alarm
Date Posted: July 24, 2006 at 6:13 PM
I have a 2006 F250 with a 791XV in it. Whenever I arm the alarm about 15 seconds later it goes off saying a door is open when they are not. I have checked all the doors and they are closed as well as the dome light turned off correctly. I grabbed all four doors at the gem module and diode isolated each one. Any ideas? I am wondering if for some reason the gem module is backfeeding now into the alarm. What is strange is that it didn't do it at first for a couple of weeks and I don't get a secondary chirp when arming but always goes off about 15 seconds later.
Replies:
Posted By: KarTuneMan
Date Posted: July 25, 2006 at 11:06 PM
On each door pin wire, put a diode in line with the cathode facing AWAY from the BCM. THEN in FRONT of those diodes put 4 more diodes, with the cathode end facing AWAY from the remote start. Then hook to the R/S alarm.
Posted By: Chris Luongo
Date Posted: July 26, 2006 at 6:36 AM
On Super Duty Fords, I've been using the dome light wire......BLACK/ blue, positive trigger, passenger kick panel......it doesn't seem to cause false alarms like some of the other Fords do.
Posted By: KarTuneMan
Date Posted: July 26, 2006 at 10:26 AM
True...but make sure you don't turn off the dome light with the switch......no door trigger!
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