Outer Limits 4x4 Board

I'm currently working on wiring up the rear tailgate to lock and unlock using a remote alarm system's outputs. It's actually harder to do than it sounds due to the factory setup of reversing the polarity to a solenoid.

I have also hooked up the factory central locking to an alarm and can draw up wiring diagrams if anyone is interested.

How did your wiring the rear door to the central locking go ???

Got it working ??

Yes, it works.

At the moment I've got the centre console lock/unlock switch to the tailgate disconnected- Daihatsu very kindly have got the contacts connected to earth when it is not switched. This results in the fuse blowing whenever the alarm applies power to lock/unlock the tailgate .

It can be fixed easily enough with a relay, but my alarm has got remote unlocking via the remote- so i haven't bothered with it. I figure it gives added security if someone does break in as they can't get the tailgate unlocked!

To get the remote central locking on the doors to work a solenoid needs to be added to the driver's door, plus a bit of wiring to control it. It only has a micro switch in it from the factory.

sorry to bring up such an old post....
i wish id read up to the last page on this forum before trying todo this myself, would have saved me a lot of time..
couple of questions for murcod:
1.do you still have the drivers door unlock/lock controling the passenger door? i had to disconnect the switch in the door when i installed the solenoid otherwise i would blow the fuses.
2. you have wired up the tailgate lock to unlock when you hit the second button or whatever on your alarm remote, correct? but when you lock the car the tailgate wouldnt be locked, most cars use the boot release as just a one way spring released actuactor not a unlock/lock.

Yes, still have the driver's door unlocking with the passenger. I simply placed a solenoid into the door and controlled that from the alarm- didn't touch any of the factory wiring or the microswitch. The alarm module locks/ unlocks the new solenoid which in turn locks/unlocks the driver's door and activates the factory micro and causes the passenger door to do the same.

The rear tailgate isn't like a normal boot release. It works by voltage polarity reversing across a coil and locking or unlocking the rear tailgate (ie apply the voltage one way and it will lock; reverse the polarity and it will unlock.) The alarm on mine will apply the voltage pulse to lock it everytime I arm the alarm; but will only unlock it when I push the second button on the remote. The voltage is only applied for a split second to the coil too- do not apply a continuous voltage across it.

Is that what that button is for?

Mine's never worked

Any suggestions on what to check to get it working? Have not even thought about it heh

if you know where the "boot/trunk" wire is on your alarm system then hook a multimeter up to it and earth the other lead of the meter, when you hit the trigger it should do a quick pulse. a analog meter or a meter with fast response time might be needed to see the pulse.

Ferwoaza wrote:Is that what that button is for?

Mine's never worked

Any suggestions on what to check to get it working? Have not even thought about it heh

The button will only work if you've got an alarm with that capability; and it needs to be hooked up electrically for it to work.

I've used two relays IIRC for mine to do it. I had to leave the switch on the centre console unplugged as it continually blew fuses with it connected (the switch earths out the rear door solenoid in the neutral position- so everytime the alarm tried to unlock the tailgate I was blowing fuses )