G - Physics – 01 – R
Patent
G - Physics
01
R
324/14
G01R 31/02 (2006.01) G01R 31/00 (2006.01)
Patent
CA 1147808
- 29 - ABSTRACT OF THE DISCLOSURE This specification discloses a vehicle elec- trical system tester which connects in parallel across the vehicle battery and the portion of the electrical system to be tested and measures voltage changes upon selective actuation of portions of the vehicle electrical system. Comparison of these measured voltages with predetermined values is used in evaluating whether the electrical system is operating properly. The method of testing using the apparatus includes measuring a first voltage level after connection of the apparatus, actuating a portion of the vehicle electrical system, measuring a second voltage level, calculating a voltage difference as a function of the first and second voltage levels, comparing the voltage difference to a predetermined voltage magnitude, and determining if the actuated portion of the electrical system is operating properly. Addi- tional sensitivity can be achieved by establishing a third voltage level through the use of a calibration resistor.
338781
Ford Motor Company Of Canada Limited
Sim & Mcburney
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