remote start door lock

I have a 2004 Saturn Vue. I have tested the door locks and i have +12 when i lock, and unlock the doors. Hence i believe it is a +12 volt door locking system.

The remote starter i am installing is an Autostart CT-3271.

Here are the instructions for installation.

Installation Diaphragm

As you can see the Green and Brown wires are for negative door locks. I believe the only way to do this is to do a relay to convert the negative pulse to a positive one.

Am i on the right track here?

Your help IS appreciated.

Sorry posted the wrong link, and i can't edit it.

Here is the new one.

WIRING

Yes, your Saturn Vue has (+) or Type A door locks so a polarity conversion is necessary.

While not completely conforming to relay conventions ( Pin 85 is typically (-) and Pin 86 is (+) ), here is a link to
the relay wiring you need to do the polarity conversion :   https://www.the12volt.com/doorlocks/page3.asp#3wp 
Use the top ( 3 Wire Positive ) diagram.

You can use the standard Bosch style SPDT automotive relays or purchase a DEI 451M door lock module ( >$9 ).

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Soldering is fun!

So it is the 3 wire positive door lock relay setup i was looking at. I guess i was on the right track.

But you confused me with "While not completely conforming to relay conventions ( Pin 85 is typically (-) and Pin 86 is (+)"

I should just follow the diagram i assume and it will be ok. I have done a few relays in my day so it isn't that new to me.

Also what amperage relay should i use?

Yes, just follow the diagram wiring and it will work fine.  For diagram expediency they reversed the Pin 85 and 86 inputs on the left ( lock ) relay.

The most common & generally available relay is rated at 30/40 Amps and will work fine for your application.  You could get away with 10 Amp relays, if you had some available.  I use 10 Amp mini-relays for those circuits.  Either way, fuse the +12V supply input at 10 Amps.

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Soldering is fun!

Cool beanz! Thx for the quick reply!