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REAR WINDOW DEFOGGER CONTENTS page page CONTROL SWITCH/TIMER RELAY MODULE . . 1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 1 REPAIR GRID LINES, TERMINALS AND PIGTAILS . 3 . . . . . . . . . . . . . . . . . . . 1 GENERAL INFORMATION For proper operation of the Rear Window Defogger system refer to the Owner’s Manual. Vehicles equipped with an electrically heated rear window defogger also have a 40/90 amp generator. The system consists of a rear glass with two verti- cal bus bars and a series of electrically connected Circuit protection is provided by a fusible link, lo- cated in the charging circuit, for the heated grid cir- When the switch is turned to the ON position, cur- rent is directed to the rear defogger grid lines. The CAUTION: Grid lines can be damaged or scraped CONTROL SWITCH/TIMER RELAY MODULE The control switch and timer relay are integrated into a single panel or console mounted assembly. Ac- SERVICE PROCEDURES Electrically heated rear window defogger operation can be checked in vehicle in the following manner: (1) Turn ignition ON. fogger control switch ON, a distinct increase in am- (4) The rear window defogger operation can be checked by feeling the glass. A distinct difference in (5) Using a DC voltmeter (Fig. 2) contact terminal B with the negative lead, and terminal A with the Fig. 1 Rear Window Defogger—Typical Fig. 2 Rear Glass Grid Line Test—Typical Ä REAR WINDOW DEFOGGER 8N - 1 |