Hi All, I appreciate all the comments. My project is not completed but well on its way, hard to do wiring in the winter. Here is an update. Heartless from Wisconsin gave me the most help, the listing for all the shop manuals for years and years of Subarus. If you are patient you can slowly learn to read wiring diagrams if you don't know already. When working on the car the challenge is to find where the connection joints are. The diagrams give the general vicinity but it is not always obvious. However the wiring diagrams give the wire colors so if you are in the right area you can eventually find the connectors. After that it is a matter of laying out the wire runs and the work of getting in there and splicing, etc. Here is an example. My 2000 legacy does not have a power seat but it does have the connection for it. So you think piece of cake but no because although the ground is connected the power line is not. But if you study the wiring diagrams you will find that the power line goes(counter intuitively) under the passenger seat and into a connector in the right side kick panel but there, unfortunately it ends. If you then study the wiring diagrams you will find that a car with power seats has a dual connection to the window circuit breaker and sure enough under the dash right in front of the driver is a circuit breaker with the same green and white wire that dead ends in the right kick panel. Get some connectors at the junk yard and you can do a nice clean install from the kick panel connector to a splice at the circuit breaker and your electric seat should be all set.
Air bags in the electric seat, like another person said, just don't connect them and you should be fine.
Heated seats, process is similar to the power seat, but here is a warning. If you hot line the power seat with a fuse you should be OK, probably not as good as the circuit breaker. But with heated seats it is a different story. If you hot line heated seats and forget to shut them off, bye bye battery!! The wiring for heated seats is a little more complicated, harder to get to the main power line and more connections to do. Here is the deal. You need to use at least the circuit breaker and relay for the heated seat system so it only activates when the ignition is on. This is not so hard to do, just study the wiring diagrams and draw it out and you will see all the connections you have to make.
One other thing, for the seat belts to work you have to probably toss the power-heated seat belt receptacle and replace it with the one from your original seat as Subaru changed the bucket insert.
Good luck to all
Edited by keggy3, 19 March 2014 - 07:45 PM.