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Pop the rear hatch open using the remote

 
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Old 19 Jun 2007, 04:59 pm
zapwizard's Avatar
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Join Date: May 2007
Location: Austin, TX
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Default Pop the rear hatch open using the remote

This is the start of a project that I need a bit of help on.

I want to make the rear hatch on my PT cruiser open fully using a button on the remote.

On my 2006 PT Cruiser the rear-hatch is electronically "popped" when you press the button on the back of the emblem. (it is not a mechanical latch) You then have to manually pull up on the hatch to get it fully open.

I discovered that there is a unused button inside the key fob that will activate the pop-circuit. It seems it is wired exactly the same as a mini-van that has this feature.

The first part is to get a keyfob that has the external button I need.
The easiest way to do that is to buy a keyfob off eBay for a Dodge/Chrysler/Jeep that has the button to open the rear hatch.
The cheaper way though is to buy a used key that has the button, and a new shell, and transfer my existing electronics into the new shell. (Which is what I am doing)

Now the hard part is how to make the hatch open fully without a ton of modification. The remote will pop the lock and push the door open slightly.
Does anyone know of a easy way to make it open fully?
I am not sure if a door popper would be able to do this, it seems they only push a small amount. A gas cylinder would require extra pressure when closing. It seems like a linear actuator could do it, but that sounds expensive and possibly complicated to me.
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Old 19 Jun 2007, 06:04 pm
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Join Date: Sep 2002
Location: Bristol, PA, USA.
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Default Re: Pop the rear hatch open using the remote

I've shaved the rear hatch of my PT severalyears ago. To open it I added a door opener solenoid to the latch internally. To phyisical open the door, I installed a couple of springs behind the lower door rubber pads. They push the door just enough to clear the latch.

I have been researching an automatic opener and closer for sometime now. Linear actuators take up to much room. The mechanism from other cars is just to expensive. I'm now looking at pneumatic cylinders, since I already have air suspension in the car, I have the compressed air I'll need.

Good luck in your project.
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Old 20 Jun 2007, 10:55 am
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Default Re: Pop the rear hatch open using the remote

Spring would work. Do you have a source for those, or a recommended spring?
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Old 21 Jun 2007, 10:39 am
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Default Re: Pop the rear hatch open using the remote

Is this what you mean by a spring?
eBay Motors: TWO 55 LB Adjustable Shave Door Handle Door Poppers (item 160129182375 end time Jun-25-07 20:00:00 PDT)

Last edited by zapwizard; 21 Jun 2007 at 10:42 am.
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Old 28 Jun 2007, 08:32 pm
zapwizard's Avatar
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Join Date: May 2007
Location: Austin, TX
Posts: 26
Default Re: Pop the rear hatch open using the remote

Ok, so I bought the springs I linked to above.
They are designed to clear the door of the latch, so I can open it by hand easy enough. But that doesn't make the hatch fully open.

Are the specific compressors for cars that are quiet?
All I can seem to find is tire pumps or airbrush compressors.

Does anyone know of a way to replace the stock air cylinders (Assist arms) with ones that could be driven with a pump? It seems like that would be the most stock looking, and require less modification to the car body.

---------------------------------------------------------------------------------------------

/Edit.
I got all my parts of eBay finally.



-A un-cut blank shell to a Jeep Liberty (includes cutout for rear-hatch)
-A used key to a Chrysler pacifica (includes the required rubber button)
-My original remote and the PCB from it.

---------------------------------------------------------------------------------------------



I took all the keys apart and re-combined them into a new fresh key that has my original transponder, the used rubber buttons, and a new un-cut key.

---------------------------------------------------------------------------------------------



I took the key to Lowes and they were able to cut it based on my original key.

simple, cheap, stock, and no secondary remote to lug around.

Last edited by zapwizard; 28 Jun 2007 at 10:23 pm.
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