5 wire actuator w/ hornet 742t
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=106717
Printed Date: May 13, 2025 at 12:35 PM
Topic: 5 wire actuator w/ hornet 742t
Posted By: mobile luck
Subject: 5 wire actuator w/ hornet 742t
Date Posted: August 11, 2008 at 8:17 PM
Hi,
I am working installing a Hornet 742T alarm in a '91 chevy caprice. I have installed after-market power locks and have so far completed everything (including getting the progressive unlocking feature working). My problem is that I installed a 5 wire actuator(DEI 524F: it has a built in micro switch)in the driver's door. I am wondering if anyone knows a way to hook this actuator up differently to the alarm module so that the car can be unlocked with the key on the driver's side when the alarm is armed without the alarm going crazy. Also, if anyone has a schematic (not wiring diagram) to this alarm module or knows where I could find one please let me know
Replies:
Posted By: i am an idiot
Date Posted: August 11, 2008 at 9:59 PM
Why do you need a schematic for the alarm? It should be easy enough to follow traces from the output terminals to the next component downline. It may have a double sided circuit board, but still not really enough traces on such a small board to need a schematic.
About the door lock actuators, is there a green wire and a blue wire on the actuator? If so chances are these are the 2 wires needed to make the actuator move. You may have to use 2 relays in a reversal, rest at ground setup to lock and unlock. Do not connect the other wires and the alarm will not know the door has been unlocked.
Posted By: mobile luck
Date Posted: August 12, 2008 at 4:32 PM
Thanks for the idea I'll think about trying that.
Posted By: mobile luck
Date Posted: August 12, 2008 at 4:58 PM
However there should be a way that the alarm allows entry using the key.
Posted By: chriswallace187
Date Posted: August 12, 2008 at 11:20 PM
Aftermarket alarms are generally not setup to disarm with a wire from the key cylinder like factory alarms are, which is both a weakness and a strength (you need the remote to disarm, but a thief can't go to a known wire in the door boot, ground it, and have the alarm overriden that easily).
If you really want that feature there's no way other than to install a switch on the back of the key cylinder (assuming there isn't one at present), figure out which wire and voltage on the PC board controls disarm, solder one wire to that trace and the other to the necessary supply voltage. IMO, just stick with using the remote.
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