LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1176 (Windows And Glass) >> Diagnosis And Testing >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test G: The Defrost System Does Not Shut Off Automatically - ON At All Times >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2005 Mercury Mountaineer, 2005 Ford Explorer, 2004 Mercury Mountaineer, and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

Under normal operation, the heated backlight relay receives power from the central junction box (CJB) through circuit 185 (BK). When the rear window defrost switch is depressed on the temperature control module, a ground signal is sent to the instrument cluster module (ICM) through circuit 688 (GY/LB). When the ICM receives ground through circuit 688 (GY/LB), the ICM grounds circuit 1009 (OG/YE) to activate the heated backlight relay. Power is then sent to the rear window defrost grid through circuit 186 (BN/LB) from the heated backlight relay. The rear window defrost grid is grounded to the chassis through circuit 1205 (BK).

scientia non olet · About LEMON Manuals