Cabin fan/heated seats

[cla67]

Ok, this one has me stumped...
Within the last 2 months I have noticed my blower motor will stop working about 30 seconds after the car is started. All lights are working fine and the defrost setting will work ok as well. Being that it is winter, I have also found the heated seats and steering wheel also turn off at the same time.

Now the odd thing, after almost 20 min. the fan and seats come on and are fine as long as the engine is on. Never cut out again. If I turn the car off and restart, no matter how long it has been running before, it takes the 20 min. cycle to reset.

I have had a fault code for the ABS system that was diagnosed as and "under voltage" but the fan issue did not coincide with when it appeared.

Are there any resources for electical schematics?

2007 3.0 with 111k. This thing has been killing me for the last 6 months. It's like they built it to fall apart at 100k.