HEATED REAR WINDOW
HEATED REAR WINDOW
The heated rear window relay supplies power to
heated rear window grid. When the operator presses
the heated rear window switch, the contacts inside
the switch momentarily close and circuit C16 con-
nects the relay timer to ground on circuit Z1. This
causes the relay to change state and complete a cir-
cuit to energize the coil side of the relay and start
the relay timer. Circuit G5 from fuse 9 in the fuse
block supplies voltage to the coil side of the relay.
Circuit Z1 provides ground for the relay.
When the heated rear window relay energizes, the
contacts inside the relay close and connect circuit
F32 to circuit C15. Fuse 3 in the fuse block protects
circuit F32.
Circuit C15 is double crimped at the heated rear
window relay. One branch of circuit C15 powers the
indicator lamp in the heated rear window switch.
The other branch of circuit C15 powers the heated
rear window grid. Circuit Z1 provides ground for the
heated rear window grid.
At the rear window grid, circuits C15 and Z1 pass
through lift gate support struts.
HELPFUL INFORMATION
²When the ignition switch is in the START or RUN
positions, it connects circuit A1 from fuse 4 in the
Power Distribution Center (PDC) to circuit A21. Cir-
cuit A21 supplies battery voltage to the fuse block
bus bar that powers circuit G5 through the fuse in
cavity 9.
²Circuit A6 from PDC fuse 3 supplies battery volt-
age to the fuse block bus bar that feeds fuse 3 and
circuit F32. Check fuse 3 in the PDC and fuse 3 in
the fuse block.
²Check for broken grid lines on the window.
²Check for a broken bus bar or disconnected leads
at the rear window.
²Check for a good ground.
DIAGRAM INDEX
Component Page
Fuse 3 (PDC)...........................8W-48-2
Fuse 4 (PDC)...........................8W-48-2
Fuse 6 (Fuse Block).......................8W-48-2
Fuse 9 (Fuse Block).......................8W-48-2
Heated Rear Window Relay..................8W-48-2
Heated Rear Window Grid...................8W-48-3
Heated Rear Window Switch.................8W-48-3
J8W-48 HEATED REAR WINDOWÐYJ VEHICLES 8W - 48 - 1
FRONT LIGHTING
INDEX
page page
Daytime Running Lamp (DRL) ModuleÐCanadian
Vehicles Only........................... 2
Diagram Index............................ 2
Fog Lamps............................... 1Headlamps............................... 1
Parking Lamps............................ 1
HEADLAMPS
The headlamp switch has three positions: ON,
PARK (parking lamps) and OFF. Two circuits, L2 and
L20, connect the headlamp switch to the headlamp
dimmer/optical horn switch. The dimmer switch feeds
the low and high beams of the headlamps.
HEADLAMP SWITCH IN OFF OR PARKING
LAMP POSITION
Circuit A3 from fuse 7 in the Power Distribution
Center (PDC) supplies battery voltage to the head-
lamp switch. The headlamp switch has an internal
circuit breaker that connects circuit A3 to circuit
L20. The switch connects circuit A3 to circuit L2
when the headlamps are ON.
Circuit L20 connects to the dimmer switch. Circuit
L20 powers the high beams of the head lamps on cir-
cuit L3 when the operator flashes the headlamps
with the turn signal stalk.
HEADLAMP SWITCH IN ON POSITION
When the headlamp switch is in the ON position,
the A3 circuit from the PDC connects to circuit L2.
Circuit L2 connects to circuit L4 through the dimmer
switch. Circuit L4 powers the low beam of the head-
lamps.
When the operator selects high beam operation
with the turn signal stalk, the dimmer switch con-
nects circuit L20 to circuit L3. Circuit L3 supplies
battery voltage to the high beams.
HEADLAMP GROUND
Although circuit Z1 provides ground for both the
right and left headlamps, it has different termination
points for each. For the right headlamp, the Z1 cir-
cuit terminates at the radiator right support. For the
left headlamp, the Z1 circuit terminates at the left
radiator support.
HELPFUL INFORMATION
²Check fuse 7 in the PDC.
²The headlamp switch has an internal circuit
breaker.
²For the left front parking lamp, turn signal, side
marker lamp, headlamp, and fog lamp, circuit Z1 ter-
minates at the left radiator support.²For the right front parking lamp, turn signal, side
marker lamp, headlamp, and fog lamp, circuit Z1 ter-
minates at the right radiator support.
PARKING LAMPS
Circuit A6 from fuse 3 in the Power Distribution
Center (PDC) connects to the fuse block bus bar that
powers circuit F33. Fuse 8 in the fuse block protects
circuit F33. Circuit F33 connects to the headlamp
switch.
The headlamp switch has three positions: ON,
PARK (parking lamps) and OFF, plus a dimmer
switch. When the headlamp switch is in the PARK or
ON position, the switch connects circuit F33 to cir-
cuit L7. From the headlamp switch, circuit L7
branches to power the front parking lamps, rear tail
lamps, and side marker lamps. Circuit L7 also pow-
ers the park lamp relay, if equipped with fog lamps.
GROUND CIRCUIT
²For the left front parking lamp, turn signal, side
marker lamp, headlamp, and fog lamp, circuit Z1 ter-
minates at the left radiator support.
²For the right front parking lamp, turn signal, side
marker lamp, headlamp, and fog lamp, circuit Z1 ter-
minates at the right radiator support.
HELPFUL INFORMATION
²Check fuse 3 in the PDC.
²Check fuse 8 in the fuse block.
²Circuit L7 also feeds the radio, if equipped.
FOG LAMPS
The fog lamps are controlled by the fog lamp
switch and two relays. The fog lamps operate only
when the headlamp switch is in the ON position, and
the operator has selected low-beam operation. When
the headlamps are in high-beam operation, the fog
lamps will not operate.
When the headlamps or parking lamps are ON, cir-
cuit L7 from the headlamp switch supplies battery
voltage to the coil side of the park lamp relay. When
the operator presses the fog lamp switch, it provides
ground for the coil side of the park lamp relay. This
energizes the relay.
J8W-50 FRONT LIGHTINGÐYJ VEHICLES 8W - 50 - 1
