2009 chrysler sebring 4 dr

I also noticed that in the diagram, the 87A pin is not used, so could i go ahead a purchase a 4 pin relay that has 85 87 86 & 30?

The 778 is a pre-wired pair of relays from Bulldog Security ( kind of like the DEI 451M ) and the 775 Relay is just a single 30/40 Amp SPDT relay ( standard Bosch 5 Pin automotive relay ) with harness. 

Yes, you can use SPST relays ( 4 pin ) for that door lock application.

Soldering is fun!

ok thanks for the info. I went around to different stores and im better off buying the 778(cost wise) http://www.autotoys.com/x/product.php?productid=8962 also in the wiring diagram it shows that the parking lights wire should output (-), but the wire i found that connects to the lights supplies (+), is the wiring diagram wrong or am I looking at the wrong wire? it shows (+) when i press the Brake.

will DB-CHALL allow me to open and lock doors without the relays? since i will be needing a bypass module, i would like if I could just buy this one module, and be able to unlock/lock doors while being able to start car

Yes, the DEI CHALL will do many things for you, locks, alarm, MUX & bypass, however you must also get the CHTH2 harness as shown in the Type C/D install diagram. This bypass is similar to the Fortin EVO-CHR with the THAR-CHR2 harness. I would also recommend using the W2W method for the connections between the Avital and the bypass module. Done on the bench, prior to installation, W2W is easy and very reliable.  The harness makes the vehicle install very quick & easy.

My favorite for that vehicle would be the ADS iDatlink ADS ALSL CH with all hardwired W2W connections ( same as the Jeep Patriot install previously mentioned ). Street price about $50.

Soldering is fun!

ok $50 sounds nice:) thanks everyone for your help, didn't think i would've had the courage to do it(since i just bought the car) but y'all made it possible.

Why would right after turning my vehicle off, the doors will not lock with remote unless I press unlock then lock? If I forgey to lock doors as soon as leaving car and return to lock it, lets say a minute later, the doors will lock with no problem. Is thos a feature in chruslers cars?

Is this problem happening with the Factory FOB's or the R/S FOB's?Soldering is fun!

with the remote start fob, it doesnt do that all the time, like today i went to walmart and as soon as i stepped out of the car, the doors locked with no problem. But like i said, theres times when the doors wont lock,but i can hear both the relay and module clicking when i press lock. It wont lock unless I press Unlock then lock.

Which bypass module did you end up using?  If you used the CH-ALL, did you go D2D or W2W?Soldering is fun!