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
