I got a new potentiometer. The old one had worn through the black coating around idle. Pins 2 and 3 give me the correct ohm range as expected. When I warm the car up and back probe pins 1 and 2 I get constant 5v. Is there something else that could be causing this? It should be 0.7v.

The 4 pin temperature sensor tests OK.

The TPS tests OK but I did have to use some force against the linkage for the full load switch to give me an ohm reading.