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Control Switch

Connect self-powered test light between ground and terminal 3.

CAUTION: Do not allow test light probe to contact any other terminal.

Turn control switch on. If test light fails, perform "Potentiometer Resistance" test. If potentiometer tests good, check continuity of terminal 3 wire to potentiometer connector.

Fig 1: Autolamp Headlight Switch (Typical)

Courtesy of FORD MOTOR CO.