06 w/ Viper 5704 remote start sets of alarm
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Joined: Jan 2012
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From: CT
06 w/ Viper 5704 remote start sets of alarm
Had a thread going over at 12volt, but haven't been able to figure this out. Wondering if anyone has had a similar problem and/or a solution.
Gist of the issue is that when I remote start with the alarm armed, it sets off the Viper alarm and quickly kills the remote start. Disarm before remote start and it works perfectly; I can even rearm after start and there are no issues. Individual door triggers were tapped and diode isolated at the BCM.
I tested a few things as suggested by the guys on 12volt and here are the results of those tests:
DMM set to 20V mode and red lead to 12v constant at amp power distribution block.
-Door open= DMM reads 12.6v (showing full ground at wire as it should)
-Door closed after being open= DMM temporarily reads 9v and then goes back up to 12.3v after 10 or 15 seconds. (I believe this means a temp. +3v at wire, then back to +0.3v.) If you open the door again, it goes up to 12.6v.
-Remote start= Initially DMM reads 12.3V as noted for door closed above. After start a drop to 9v is seen (just as with above) and stays there while running.
-As an extra test, I put the DMM in continuity mode (mine reads "1" with open circuit, reads "0" and beeps when closed). Black lead to ground and red to wire gives slight noise at all doors (reads 0.113) and a full beep (reads 0) at the open door (all tested on Ford side of diode). Each individual door worked the same.
Gist of the issue is that when I remote start with the alarm armed, it sets off the Viper alarm and quickly kills the remote start. Disarm before remote start and it works perfectly; I can even rearm after start and there are no issues. Individual door triggers were tapped and diode isolated at the BCM.
I tested a few things as suggested by the guys on 12volt and here are the results of those tests:
DMM set to 20V mode and red lead to 12v constant at amp power distribution block.
-Door open= DMM reads 12.6v (showing full ground at wire as it should)
-Door closed after being open= DMM temporarily reads 9v and then goes back up to 12.3v after 10 or 15 seconds. (I believe this means a temp. +3v at wire, then back to +0.3v.) If you open the door again, it goes up to 12.6v.
-Remote start= Initially DMM reads 12.3V as noted for door closed above. After start a drop to 9v is seen (just as with above) and stays there while running.
-As an extra test, I put the DMM in continuity mode (mine reads "1" with open circuit, reads "0" and beeps when closed). Black lead to ground and red to wire gives slight noise at all doors (reads 0.113) and a full beep (reads 0) at the open door (all tested on Ford side of diode). Each individual door worked the same.
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Joined: Jul 2006
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From: Rancho Cucamonga, CA
i believe u need to further isolate the door trigger from the bcm. you need to cut the wire for each door trigger and insert a diode with the cathode facing the bcm side. then with that done for each door, then you diode isolate them to connect to the alarm. thats how its set up in my 06. but im going off of memory right now. its been a while since i installed mine.
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From: CT
i believe u need to further isolate the door trigger from the bcm. you need to cut the wire for each door trigger and insert a diode with the cathode facing the bcm side. then with that done for each door, then you diode isolate them to connect to the alarm. thats how its set up in my 06. but im going off of memory right now. its been a while since i installed mine.
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From: CT
In case anyone runs into the same issue. Double diode isolate as snowboarder suggested and it works perfectly.