1993 blower motor slow.

[junk]

This 1993 truck I bought also had a dead blower motor for the heat and air. I changed out the blower motor resistor and blower motor with parts I had. It now works and at all speeds, but it still seems to be slow on all speeds. Is there a common fail point in this circuit that builds up corrosion or commonly gets a bad ground? I will state the truck wasn't running when I checked it so maybe I'm just being paranoid and it will straighten out once I can check it running. Vacuums working and getting 14+ volts versus 12ish.

Thanks,
Jeremy