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ELECTRICAL/HEATED GLASS/REAR WINDOW DEFOGGER GRID - STANDARD PROCEDURE - DIAGNOSIS AND TESTING ELECTRIC BACKLIGHT (EBL) SYSTEM NOTE: Illumination of the defogger switch indicator NOTE: For circuit descriptions and diagrams of the Operation of the electrical backlight (EBL) system can be confirmed by the following: (1) Turn the ignition switch to the On position. Set the rear window defogger switch in the On position. (2) If a temperature difference is not detected, use a 12-volt DC voltmeter and contact the rear glass • Confirm that the ignition switch is On. • Make sure that the rear glass heating grid feed wire and ground wire are connected to the terminals. • Check the EBL relay and fuse located in the power distribution center (PDC) in the engine com- partment. The relay and fuse must be tight in their (3) When the above steps have been completed and the system is still inoperative, one or more of the fol- a DRBIII t scan tool to perform further diagnostics. Refer to Body Diagnostic Procedures. • Rear window defogger switch in the A/C-heater control. • Rear window defogger timing circuity in the A/C- heater control. • Fused ignition switch output circuit from the body control module (BCM). • Rear window defogger grid lines (all grid lines would have to be broken, or the power feed or the (4) If the EBL system operation has been verified but rear window defogger LED indicator does not REAR WINDOW DEFOGGER DESCRIPTION The rear window defogger (EBL) relay (Fig. 4) is a International Standards Organization (ISO) micro-re- Fig. 2 Rear Window Defogger Switch 1 - BLOWER SPEED CONTROL Fig. 3 Grid Line Test 1 - VIEW FROM INSIDE VEHICLE 8G - 2 HEATED SYSTEMS ZB HEATED GLASS (Continued) |