My fan blower doesnt seem to blow at any speed selected on the switch. When in A/C mode the compressor kicks on and spins but there is no air flow from the fan when the heat or the air is on... any ideas?
Fuse panel checked? Do this first. Check the connector on the passenger side of the high voltage relay on the firewall. Bad switch in the dash? Bad blower motor and bad ground connection to the motor?
I checked the fuses...I think I am going to order a relay just to see if that does it, its only $17 if its the switch is that something I can order online?
I would not do that. If it was the relay itself you would have blower speeds in all but the high speed setting. Check the connector that plugs into the high speed relay. See if there is power to the blower motor first. If you do it is the blower motor or the ground for the motor.
ok, I will check this tonight. Thanks, I didnt order the relay yet. ---------- Post added at 02:09 PM ---------- Previous post was at 02:09 PM ---------- Where is that? How do I check it?
If it were the resistor, I think you'd still get blower movement, just not all speeds I had a similar problem... a couple times. First time I found the power wire was off the blower motor. After contorting my arm and then my wife's arm we got the wire back on and all was good. Fast forward just a few week, no blower again. I traced the blower power wire back across the firewall and found the main power red wire and there was no power. Traced back to the fuse and sure enough some one but a very low amp fuse in it. I replaced it and its been fine so far.
If it was the resistor array would he not still have high speed fan? I would have to look at the diagram, but this is how I would have thought it would be wired. He says he does not have the high speed fan. The resistor array is genrerally located in the AC box under the hood if it is an AC car.
put a test light in the fan connector if you get any light its the motor if not check backward from there. if its the resistor you would only get high. probably not the problem, its more likely the switch or the the motor to cause a total failure, unless its a broken connection or wire somewhere. that will be tough to track unless you've done some work around the wiring that could be the problem
so after reading another thread I hooked a jumper from the positive battery terminal to the blower and nothing...bad blower motor? is it hard to replace that? looks buried... I am gonna check the ground out better tomorrow night to make sure thats not it. do these things just go bad? is there anything that may have caused it that I can fix whilst replacing it?
fun ---------- Post added at 09:24 AM ---------- Previous post was at 09:03 AM ---------- so, if the blower didnt do anything when I hooked power to it, is it a pretty safe bet that the blower motor is the issue? http://www.1aauto.com/1A/blower-motor/Buick/Riviera/1AHCX00013/213258/1971 50 bucks, not too bad...
If you hooked power and ground to the blower and got nothing, it sounds like its done. I had a difficult time hooking up the power wire that I accidentally pulled off because it sits in behind the fender. I ended up unbolting the lower fender and inner, pulling the lower fender out and reaching up. You might have better access that way instead of removing the fender Ive even heard of guys cutting a square in the inner fender to get access and welding it up and cover it in undercoating. Maybe you could remove just the inner fender?
I hooked power to it, but did not do anything with the ground. I will check to make sure it is grounded well before I do anything else. It looks kinda buried but after watching the video for the gmc truck at the link I posted, it might be tight but I may be able to get it out without too much trouble...we'll see. I'll keep the thread updated. Thanks everyone.
So, btwn unhooking the blower motor and banging it around trying to get it out an rehooking it all back up with a different ground...I have a working blower again! Thanks everyone! This site is awesome!
So how did you get access to the blower motor? Pull the fender, inner fender...? I'm looking at the same problem and haven't had the motivation to really start messing with the body panels to get to the motor.
I actually just unbolted the motor and pulled it off (couldnt get it out of the car, just unhooked and banged around trying to see if the cage for the fan could be disconnected so that I could maybe pull it out without removing the fendor). I dont know if it was banging it around or just regrounding it better.
