Electrical Problem With Grounding

Discussion in 'Fox 5.0 Mustang Tech' started by Luis911, Oct 14, 2013.

  1. When I adjust the TPS sensor, the voltage should be between .97 and .98, making the measurement from the TPS sensor wires, the voltage is 0.85, but if I measure using a sensor cable and ground (for example intake), the measurement is 1.10 (on the website of latemodelrestoration.com, and measure it

    View: http://www.youtube.com/watch?v=HUwr0g5Qn7s&feature=player_embedded
    # t = 10), which is the correct way to measure? or I have a problem with ground?, because the measure between the negative battery and the connector 46 is 5 ohms and here mentioned it had to be equal or less than 2 ohms.
    It can make a bridge between the negative battery and the black wire TPS sensor?
  2. You use the TPS sensor wires. You dont need to be exact. .85v is fine.
  3. thanks for the reply, and referring to the resistance between ground and battery negative which should be the right value?
  4. You cannot measure resistance in a circuit that has power turned on. In order to get correct resistance measurements, you must disconnect either the positive or negative battery cable. The small voltage drop between the battery post and the device under test will cause incorrect resistance readings.