Blower fan motor is not working?

About a year ago my AC/Heat blower fan quit working but it would always work after I hit the dash with my hand on the passenger side. But recently this has not worked at all. I am assuming it is a loose electrical connection somewhere but I have no idea where to start or what to do.

Thought so, perhaps the burnt smell is the resistor will check voltage and see if it's open. This seems to be a normal failure from my reading. Can you please email me the blower motor inop trouble tree? My motor works until I hit a bump then goes out. That would probably make it electrical, right? Thanks again

Could you please post, or can you email me a copy of the troubleshooting tree as well? I seem to be having the same problem with my '04 Monte Carlo SS

I have a 2002 ls with the same problem. Heat and aux will not work. Turned the fan nobs on all the way and nothing. Can someone send me the troubleshoot link?

I have the exact same car same year also, and am having the same problem could you email me the blower motor inop trouble tree?

I replaced climate control already. I have heat, but the air conditioner/heat fan wont blow.

Okay here we go.
The blower worked intermittently had to wiggle the wires to get it to work then it just stopped replaced blower motor and controller also replaced wiring harness from controller to motor as the connector to motor was melted.
Blower motor still inoperable
Checked the following:
all fuses they checked good.
Checked to be sure motor control module had voltage it has 12 volts incoming no output checked motor by putting jumper on it blows fine.
Checked the small reference voltage wire going to the blower control module this is where I think my problem is only got milli volts but could see them change from 0 -.15
all the other functions on my HVAC controller work fine just blower wont work.
So here are my questions:
Should I have 0 - 12 VDC on the reference wire(small grey/black strip)?
Where does the voltage for that come from through the HVAC controller or is it a low voltage reference fed in from the BCM?

Hi Roy, thanks for the diagrams. Checked the voltages at the blower module incoming voltage check out at 12 volts. There is no output voltage coming from module to the blower. I changed the module and same result. What voltage should I be getting from the small grey wire with the black stripe?

Hey Roy, I was checking the voltages again and discovered I had 12 volts coming in to the module until I plugged it in then voltage dropped down to less than 5 volts. Ran a jumper wire to the 12 volt input and the fan started working. Guess I should look for a bad connection between the fuse box and the fan.

Will be doing some more checking on the fuse box, but at least I am on the right track now. Thanks for your help.

It does not have automatic climate control just manual knobs for fan speed and vent control and two sliders for temperature. Last weeks I notice my my AC/Heat blower fan quit working. Later that day I hit a bumb and it came back on. Now it just goes off and on at random. I am assuming it is a loose electrical connection somewhere but I have no idea where to start or what to do. I read another post where the blower motor inop trouble tree was given. Please help it getting cold outside

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