Sorry to hear the belt didn't solve the noise problem. A blower bearing failure is pretty rare, that was why I was so sure it would be the belt. Plus the very recent experience with Mike's car.
AS far as the TPS voltage, first check the most obvious- is the meter set to the correct scale. I am sure it is, but sometimes those get bumped.
Second, check to see that you are using the correct wire to read the voltage.
one should have the supply voltage~5.00 volts
another shoud have the TPS voltage.
I am pretty sure that is the center wire in the connector on the TPS sensor. That is the one to monitor. I use a large pin to probe the connector.
Later,
Dan