Today I spent some time looking at the wiring state of the Outback. First, I pulled out the rear console, and took a look a the connector there (R43). It has 22 pins, but many of them are not populated. The ones that are populated are:
|6||+12V to accessory socket|
|12||+12V for general illumination|
|13||Ground for GI|
|17||Gnd to accessory socket|
So… It looks like we have the illumination circuit and a decent ground (the ground for the seats and the accessory socket is shared), but we don’t have the +12V we need for the heater. A bit disappointing, but not unexpected.
I pull the fuse box cover off, and find that fuse 17 (the seat heater fuse) *is* present. I pull the lower console cover off – more than a little pain in the butt – and find out a few more things. First, the relay for the heated seats is not present. However, the location that it sits on the relay board is wired with 4 connections. So… my current theory is that if I have a fuse, I will be complete up to connector B97 (which is somewhere near the fuse box), but then I’ll have to tap into a wire there and run it the power from that.
I also still need to figure out how the dimming system works. Since 12V is supplied to the lights, I’m presuming that the dimmer supplies a voltage somewhat higher than ground, and that’s how the dimming works. Could be wrong, however.