Greetings, been fighting a demon on my 85 Riviera for a while now and with winter fast approaching here in MT, I gotta get the heater fixed. I guess I should start from the beginning. One day the ECC system decides to go "Haywire" the door that's right inside the floor vent center of the dash just kept running over and over again. So I watched it and it would try to close the door run out of steam and open again and try to close again. So I stuck a stick up in there to hold the door shut. In retrospect a bad ideal, all was well for about 20mins. Next the entire system went dead, and went to full blower ice cold air. (at the time it was still winter here). So the only way to fix that was pulling the fuse. So I replaced the ECC head unit. The replacement started smoking as soon as I turned the key. Now all the ECC system dose is sit there and flash at me, and not very often I will hear that door cycle and some other motor moving something. I have felt heat once, but 99.9% of the time it just spits out a low flow of cold air out the floor vents pushing buttons on the ECC has no effect. So yesterday I went out to the junkyard and pulled a new motor that controls that floor vent door. I will replace that and reset the ECC system and report back! The cars AC system is long not working. The yard dose not have anymore ECC headunits, so I am on the serch for one. I don't have a service manual for the car. Am I missing something here, will I have replace the ECC head unit again? Any and all ideals and inputs welcome.
I got the motor replaced and the system still is not happy(blinking light) but it is making heat. I then proceeded take apart the motor module and remove the bare motor from the housing. Upon testing that motor it appears to have a direct short to ground. 6.6ohms on the 200 scale on one leg and 0.06 on the other leg to the motor case.
