Leaderboard

I don't see what you could have done wrong if all your readings were as you say. It a simple potentiometer setup with an on/off switch on the side to let the ECU positively know when the throttle is in the full idle position. If you currently have no continuity between pins B&D, unlike when you tested it new, that would indicate that the carbon trace on the board had burned in half or was separated somehow. If you now connect the Ohm meter between pins B &C and then turn the shaft from stop to stop, do you ever measure anything but an open connection as the wiper sweeps around the carbon trace? The 5 volt signal should not be able to supply enough current to damage the sensor. Even if that supply wire measured 12 volts, it would barely generate 0.003 amps (0.04 watts) which should easily be handled by the carbon wiper. I don't know what kind of time schedule you are under but I can offer to bench test the TPS and see if I can determine what failed. Not much to lose except for the time to mail it back and forth and the postage cost. I myself would not risk another new TPS until I had a better idea what failed.