Just to follow up - cause I've searched a ton & only 2nd writeup/video I've understood... I got TEDFan working, just differently & with 1 on/of/on switch.
On/off/on switch- middle to +12v from battery
Other 2 + to 5 pin relay (has led so red = heat, green - was low = cool)
5 pin has left to...
You sir, are a genius & godsend. Been trying to wire '14 MKS seats into a '02 4Runner. Got all but the Ted - could only figure bout 80% of the wiring. With your diagram as inspiration I got the fan & TED powered up - now just need to figure the hot/cold switch... huge upgrade to a 20 yr old...