Before anyone asks, yes, i have searched. in fact, i've been using this service to work on my girlfriends 190e for a while now and have just now come to the point where i can't find the answer i need.

heres my situation:
before today, the AC/Heater never worked.. i had checked all of the fuses that i knew of to check and they were fine. no matter what i pushed on the control unit, it didn't help. if i'm driving the car at a decent speed, warm/hot air comes through the side vents, regular air comes through the center vent. the temp setting doesn't matter, the buttons don't matter, and the fan slider doesn't matter. the fan does not turn on at all.

come to today and my pops & i have pulled out the blower motor and tested it to the battery wanting to find out if it needed replaced first... it worked!!! yeay!!
however, now i'm at a stand still, i do not know the order of components from the power of the car to the blower motor (fuses, relays, switches, etc) and also don't know what some of the common things to look for would be. if anyone can help me out, that would be absolutely awesome!

car specs:
1991 MB 190e 2.6 v6
224,000 miles