Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Ford Motor Co.
System is controlled by a three position switch. This switch is spring loaded to return from an ON or OFF position to its center or neutral position. There are two different relays used, the latching relay and time delay relay. These two relays operate as follows:
When the switch is turned to ON, the latching relay is energized and delivers current to grid wires at back window. The term "latching relay" is used since the relay remains energized until either the control switch or ignition switch is turned off.
The time delay relay operates in the same manner as the locking relay system except that the time delay system has an electronic timing circuit in the relay. The timer allows the rear window grid to operate for a specified time and then shuts it off.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.