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 1082 (Windows And Glass) >> Diagnosis And Testing >> Glass, Frames and Mechanisms >> Pinpoint Tests >> Pinpoint Test F: The Defrost System Is Inoperative >> Normal Operation

Normal Operation

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

The heated backlight relay, which is integral to the smart junction box (SJB), receives power from circuit 1846 (GY/LB). When the rear window defrost switch is pressed on the electronic automatic temperature control (EATC) or electronic manual temperature control module (EMTC) control unit, a message is sent to the SJB through circuit 1426 (PK). Once the SJB receives the message to turn on the rear window defrost, the SJB grounds the heated backlight relay coil, which sends power to the rear window defrost grid through circuit 186 (BN/LB) from the SJB. The rear window defrost grid uses circuit 1205 (BK) for ground.

scientia non olet · About LEMON Manuals