Hi,
I finally found the unit. In the wagons, it is behind the spare tire between the outerskin of the body and the inner frame work. The unit cannot really be seen, but the connectors are visible.
The receiver I am installing is from Crutchfield and I must comment about them.
1. The directions from them were specific to the sedan and of no help for the wagon. When I spoke to them about, they said the directions were for both.
2. I ordered the dash kit (Scosche) from them and when I examined it, the lettering on the Rear Defog button was upside down. I called tech support and asked if there was any way of turning it. The tech said no, and they would send out a replacement. The replacement came with the lettering correct, but the button was broken. This time the tech went to the shelves to examine one. He told me that the one he was looking had the letters turned 90 degrees. I said could you possibly find a correct one and send it. He said that they would send out another replacement, but it would be the last one, since it is their policy to only send 2 replacements. I said fine, thinking that if this one was defective, I would return everything. Luckily, the second replacement came yesterday, it appears to be fine. I am hoping that it also works.
Hopefully, I will do the installation this weekend.