I have some tips on how to use an ohm meter to test a TPS on my web page. One good tip is to go visit your local electronics shop (like Radio Shack) and buy a couple of resistors of known value and then use the meter to read the resistance and verify that you are getting a reading that makes sense. That way you have eliminated one unknown from the equation, so if you have a 1000 ohm resistor you know the reading on the meter should be something close to 1000 ohms (plus or minus the resistor's tolerance). So on the 200 (ohm) scale, it should read infinite or off scale, on 2K (2000 ohms), it should read 1.000, and so on.

The one thing with an ohm meter is that you will always get a reading, be it 0, infinite or something in between. The trick is getting the *correct* reading.