I have a 02 fx4 SCrew. 5.4, .... I am installing a Code Alarm PC Elite 7500 (Same as the factory Gold level ) remote starter/Alarm. I have everything working except I am having one problem. I hooked the alarm up to the interior lights (orange wire behind light switch) as the trigger for a door being opened (also tried Blk/Yl wire on driver kick wall, it is the drivers door trigger). The system arms fine and it shows everything is fine. At about 45 minutes after arming the alarm it goes off and shows that a door has beened opened. From what I can find on the net, the GEM goes into some sort of sleep mode thus reducing the power to the wires from 12 volts to lower. To the alarm system it looks like the door opened as it grounds the switch when it opens. Anybody know how I can hook this up to prevent this from happening?

 

The black/yellow catches the drivers door and the black/pink catches the passengers door. The wires are found in there respective door harnesses. On the Super Crew the rear door trigger is black/lt. blue low in the driver kick panel. Use all wires and diode isolate each. See directfax document #1076

Did you diode them?? If you need the Techsoft diagram #1076, email me, and I will email it to you, it shows how to diode isolate the wires, ect....

ip3@centurytel.net

Hak

 

Haku,
I have tried using the door wires seperatly and dioding them. One of the wiring diagrams shows I should use the interior light wire that way it catches all the doors easly. The problem is not getting it to work correctly, the problem I have is that after 45 minutes the alarm goes off and shows a door was opened. What I can find online says that the computer goes into a power saving mode after 45 minutes and voltages drop. This appears to be what is causing the false alarm. Please email me the diagram too.

cmmarchel

 

I need an email adress to send it too.

Hak

 

You should also be diode isolating the GEM from the door trigger as well. This will prevent the GEM from showing a ground after 45min. It shows this in the 1076 document. The document is in PDF, I would post it here, but takes too long. Email me if you do not want your adress posted.

ip3@centurytel.net

Hak

 

If your voltage is not dropping to zero, it looks like you could use a relay and your original method with the dome light. This way you could use a true 12V constant source to trigger the alarm.

BTW, where did you get your remote starter/alarm? I've been thinking about installing one on my S'Crew all winter long.

HiO

 

HiHoSilver,

I got it on ebay. found a couple good prices on the 7500 and the 7600. If you don't need the alarm peice, I recommend the f50/55 from code alarm. Easy to install and works well.

 

I don't know how low the voltage goes yet. I haven't left a voltameter set up on it yet to see how low it goes. A typical relay will stay activated until about 3 volts, so as long as it doesn't go below that it should work. Had to do the same thing for the PATS module witha relay.


Chris

 

haku,

chris@marchel.org

Thanks

 

The problem is not with 12V, the problem is that your GEM is going to sleep, when it does this, the alarm sees a ground, and activates. Its not the loss of 12v on that line that does it, your alarm trigger is ground, not loss of 12v. So to make it simple, if your just using one door trigger, then you would cut the door trigger wire, place a diode in line (with the stripe AWAY from the GEM), then attach the alarm trigger wire to the door side of the diode. If your doing all the wires, then EACH one has to be isolated from the GEM (as in above), and each trigger wire has to be isolated from each other.

Hak

 

Hak,
Thank you for the file, it helps a lot. Could I not do the same thing with the orange(dome light) wire that is triggered by the door being opened? My remote start came with a couple of 1 stripe diodes in the installation kit.

 

If I were doing it, thats what I would do. Use a relay thou, It would be wired as follows. (Im assuming your using the wire that shows 12v when the doors are open)

Pin 85 Hook to the wire that shows 12v when doors are open

Pin 86 Constant GROUND

Pin 87 Constant GROUND

Pin 30 Door trigger wire from the alarm system.

If the wire shows ground when the doors are open, still use a relay, wire as follows.

Pin 85 Constant 12V

Pin 86 Hook to the wire that shows ground when the doors are open

Pin 87 Constant GROUND

Pin 30 Door trigger wire from the alarm system


Hak

 

Thanks for the info. Hopefully this applies to the '01 S'Crew also.

HiO

 

Yep it does. If you need a diagram for your truck, shoot me an email, and I will send it to you.

Hak

 

I have to reopen this, I did a check with the voltameter today. In sleep mode, the connections for the doors and the light go to full ground. In this case a relay will not work. Anyone have any other ideas?