W

WATT - A measurement of power. One volt multiplied by 1 amp equals 1 watt, and 746 watts equal 1 horsepower. One "kilowatt" equals 1,000 watts.
WIGGLE TEST - Performed with either a voltmeter or star tester while wiggling or tapping the system harness connectors.

WIPER - Refer to "potentiometer."

WIRING HARNESS - A bundle of insulated electrical wires covered by an additional insulating jacket. The individual wires emerge from the harness at different points to go to various components.

WRITE - A microcomputer operation where information is sent to and stored in memory.