Hey guys I have tried searching but I have found nothing... The blower motor blows only 1, 2, 3, but doesn't blow anything when I put it on 4. If you guys can help me diagnose this problem I'd appreciate it! Thanks guys!

 

no one knows what's wrong?

 

I had this same problem, it was my blower motor. Its a quick fix. Check your blower relay as well. I replaced mine with the motor.

 

where's the blower motor relay located?

 

In the blower housing if i remember correctly.