Neon L4-2.0L DOHC (1996)
Rear Window Defogger: Description and Operation
CIRCUIT OPERATION
The Rear Window Defogger system is powered by a 40 Amp fuse located in the Power Distribution Center (PDC) on circuit A4. This circuit is
HOT at all times. The system is also powered by a 10 Amp fuse located in cavity 8 of the fuse block, this fuse is HOT in the RUN position only.
When the operator presses the rear window defogger switch the contacts internal to the switch CLOSE and the timer starts. When the switch is
released the timer circuity keeps the relay energized for the specified time.
Voltage is passed through the switch on the A4 circuit to the C15 circuit and then to the rear window defogger grid. The grid consists of two bus
bars and grid lines that form a parallel circuit. When voltage is passed through the grid, the grid lines heat up and heat the rear window.
Grounding for the rear window defogger switch is provided on the Z2 circuit and terminates at the instrument panel right center support. The grid
uses the grounding point at the rear body in the right wheel house.
When the system is in operation, a L.E.D. located in the switch, indicates to the operator the system is functioning. The switch is also illuminated
when the headlamp switch is in the PARK or ON position. Power for the illumination circuit comes from the 4 Amp fuse, located in cavity 12 of
the fuse block, on the E2 circuit.
