I just installed a Evic in my 05 sport the wiring is very simple the hardest part ( for me ) was curing the hole I tried using a plastic retainer from a WJ and I cut the whole to big make sure you use a KJ retainer it took about 20 minitutes to run the wires and mount everything and it work's just like it doe's from the factory but make sure your evic is from a 04+ KJ or your temp and door readings won't work.

I want to swap the existing cloth seats in my sport with heated leather seats.

Has anyone ever done it successfully?

Also, I have an EVIC ready to be installed, what will it take?

either you install leather covers on your existing seats, or you install leather seats into your existing vehicle. If you find a set of nice stock leather seats to swap in you will need to remove the passenger occupancy sensor from your old passenger seat and install into your new leather seat.

Oh plus some other wiring stuff that isnt too bad, you just need to run some wires around.......Ive done it before....I can help you through it but I don't want to post the specifics until you actually do it since I need to figure it out all over again.

Great ... so did you have to modify the wiring?

Sam, I have the seats in my garage, they are motorized and heated from a donor 2005 LIberty gasser.

I also took 4' of harness with the connectors. I appreciate the assistance.

No,There is 4 wires for the Evic you run them down the Apiller to the OBDII port and one to a keyed ignition source here is a guide I used to figure out where they go http://alucinari.net/jeep/kj/evic_install/

Oh ok good. Well guess now I actually need to look through the FSM for the relevant wiring diagrams........basically most of the wires in those bundles connect up from left seat to right seat. There is an electronic control module for the heated seats that is under one of the seats. You will need to tie in the existing wiring and connect the wires left to right, and then tie into 2 power sources......the factory circuit for the heated seats is not present, while the wire runs under the carpet, the fuse is missing and the wiring in the dash is missing......so you cannot just add a fuse.

I'd recommend De-pinning your existing wires that you need to retain and adding them to the new plugs.........

I'll dig up some diagrams for you tonight.....

Ok, I will be comparing the existing harness in my CRD with the 4' section of harness I took from the donor vehicle, to see if by chance it has the wiring for the motorized seats already present. I doubt it but the process will get me started towards making sense of this jungle of wires.

Basically you make all the wires that need to go from the left to right connect up

The donor harness may already consider the connections between the seats.... don't you think? The connection between the seats may already be there.

You will have one extra plug on the new donor than your existing, but I would recommend you repin and add the wires on the exist plug so there are no splices.

Hey racetracer, I think the guy that posted that picture did not use a relay in that configuration. If you do find a way for the heat that would be great!

I wired it up last night and the circuit will work as shown......

I'm going to clean up the diagram (I eliminates a tap splice and the red jumper wire between the Pink/Grey and the Red)