Method and apparatus for measuring a parameter of a vehicle electrical system

  • US 8,164,343 B2
  • Filed: 10/30/2008
  • Issued: 04/24/2012
  • Est. Priority Date: 09/05/2003
  • Status: Active Grant
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First Claim
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1. A vehicle electrical system tester for testing the electrical system of a vehicle, the electrical system having wiring which couples a load to a battery, the vehicle electrical system tester configured to measure an electrical parameter of the wiring and comprising:

  • a first battery terminal connection configured to couple to a first terminal of the battery;

    a second battery terminal connection configured to couple to a second terminal of the battery;

    a test connection configured to couple to a wire of the electrical system which is electrically connected between the first or second terminal of the battery and the load; and

    test circuitry coupled to the first and second battery, terminal connections and the test connection, said test circuitry comprising a processor programmed to draw current from the battery along a path through the wire and the test connection and return the current to the battery, measure the electrical parameter of the wire with a sensor coupled to the test connection and responsibly provide an output based upon the electrical parameter and a measurement of a gauge of the wire.

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