Apparatus and method for calibrated testing of a vehicle electrical system
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United States of America Patent
Stats
-
Jun 10, 1980
Grant Date -
N/A
app pub date -
Dec 18, 1978
filing date -
Dec 18, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This specification discloses a vehicle electrical 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. Additional sensitivity can be achieved by establishing a third voltage level through the use of a calibration resistor.
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