Dodge Durango (DN). Manual — part 310
If the defogger system does not operate, the prob-
lem should be isolated in the following manner:
(1) Confirm that the ignition switch is in the On
position.
(2) Ensure that the rear glass heating grid feed
and ground wires are connected to the glass. Confirm
that the ground wire has continuity to ground.
(3) Check the fuses in the Power Distribution Cen-
ter (PDC) and in the junction block. The fuses must
be tight in their receptacles and all electrical connec-
tions must be secure.
When the above steps have been completed and the
rear glass heating grid is still inoperative, one or
more of the following is faulty:
• Rear window switch pod
• Rear window grid lines (all grid lines would
have to be broken or one of the feed wires discon-
nected for the entire system to be inoperative).
If setting the defogger switch to the On position
produces a severe voltmeter deflection, check for a
short circuit between the rear window switch pod
defogger relay output and the rear glass heating grid.
REAR GLASS HEATING GRID
For circuit descriptions and diagrams, refer to
8W-48 - Rear Window Defogger in Group 8W - Wir-
ing Diagrams. To detect breaks in the grid lines, the
following procedure is required:
(1) Turn the ignition switch to the On position. Set
the defogger switch in the On position. The indicator
lamp should light. If OK, go to Step 2. If not OK, see
Defogger Switch in the Diagnosis and Testing section
of this group.
(2) Using a 12-volt DC voltmeter, contact the ver-
tical bus bar on the right side of the vehicle with the
negative lead. With the positive lead, contact the ver-
tical bus bar on the left side of the vehicle. The volt-
meter should read battery voltage. If OK, go to Step
3. If not OK, repair the open circuit to the defogger
relay as required.
(3) With the negative lead of the voltmeter, contact
a good body ground point. The voltage reading should
not change. If OK, go to Step 4. If not OK, repair the
circuit to ground as required.
(4) Connect the negative lead of the voltmeter to
the right side bus bar and touch each grid line at
midpoint C with the positive lead. A reading of
approximately six volts indicates a line is good. A
reading of zero volts indicates a break in the grid
line between midpoint C and the left side bus bar. A
reading of ten to fourteen volts indicates a break
between midpoint C and the right side bus bar. Move
the positive lead on the grid line towards the break
and the voltage reading will change as soon as the
break is crossed.
DEFOGGER SWITCH
For circuit descriptions and diagrams, refer to
8W-48 - Rear Window Defogger in Group 8W - Wir-
ing Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER
TO
GROUP
8M
-
PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL,
STEERING
COLUMN,
OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable. Remove the lower bezel from the instrument
panel and unplug the rear window switch pod wire
harness connector.
(2) Check for continuity between the ground cir-
cuit cavity of the rear window switch pod wire har-
ness connector and a good ground. There should be
continuity. If OK, go to Step 3. If not OK, repair the
open circuit as required.
(3) Connect the battery negative cable. Check for
battery voltage at the fused B(+) circuit cavity of the
rear window switch pod wire harness connector. If
OK, go to Step 4. If not OK, repair the circuit to the
Power Distribution Center (PDC) fuse as required.
(4) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (run) circuit cavity of the rear window switch
pod wire harness connector. If OK, go to Step 5. If
Fig. 1 Rear Window Glass Grid Test
1 – TERMINAL “A”
2 – TERMINAL “B”
3 – FEED WIRE
4 – MID-POINT “C” (TYPICAL)
5 – HEATED REAR WINDOW DEFOGGER GRID
6 – GROUND WIRE
DN
ELECTRICALLY HEATED SYSTEMS
8N - 3
DIAGNOSIS AND TESTING (Continued)
not OK, repair the circuit to the junction block fuse
as required.
(5) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Plug the wire harness connector into the rear win-
dow switch pod. Connect the battery negative cable.
Turn the ignition switch to the On position. Back
probe the rear window defogger relay output circuit
cavity of the rear window switch pod wire harness
connector. Depress and release the rear window
defogger switch. There should be battery voltage.
Depress and release the rear window defogger switch
again. There should be zero volts. If OK, go to Step 6.
If not OK, replace the faulty rear window switch pod.
(6) Depress and release the rear window defogger
switch. The rear window defogger indicator lamp
should light. If the indicator lamp does not light,
replace the bulb with a known good unit and test
again. If the lamp is still inoperative, replace the
faulty rear window switch pod.
SERVICE PROCEDURES
REAR GLASS HEATING GRID REPAIR
Repair of the rear glass heating grid lines, bus
bars, terminals or pigtail wires can be accomplished
using a Mopar Rear Window Defogger Repair Kit
(Part Number 4267922) or equivalent.
WARNING: MATERIALS
CONTAINED
IN
THE
REPAIR KIT MAY CAUSE SKIN OR EYE IRRITATION.
THE KIT CONTAINS EPOXY RESIN AND AMINE
TYPE HARDENER, WHICH ARE HARMFUL IF SWAL-
LOWED. AVOID CONTACT WITH THE SKIN AND
EYES. FOR SKIN CONTACT, WASH THE AFFECTED
AREAS WITH SOAP AND WATER. FOR CONTACT
WITH THE EYES, FLUSH WITH PLENTY OF WATER.
DO NOT TAKE INTERNALLY. IF TAKEN INTER-
NALLY, INDUCE VOMITING AND CALL A PHYSICIAN
IMMEDIATELY. USE WITH ADEQUATE VENTILA-
TION. DO NOT USE NEAR FIRE OR FLAME. CON-
TAINS FLAMMABLE SOLVENTS. KEEP OUT OF THE
REACH OF CHILDREN.
(1) Mask the repair area so that the conductive
epoxy can be applied neatly. Extend the epoxy appli-
cation onto the grid line or the bus bar on each side
of the break (Fig. 2).
(2) Follow the instructions in the repair kit for
preparing the damaged area.
(3) Remove the package separator clamp and mix
the two conductive epoxy components thoroughly
within the packaging. Fold the package in half and
cut the center corner to dispense the epoxy.
(4) For grid line repairs, mask the area to be
repaired with masking tape or a template.
(5) Apply the epoxy through the slit in the mask-
ing tape or template. Overlap both ends of the break
by at least 19 millimeters (0.75 inch).
(6) For a terminal or pigtail wire replacement,
mask the adjacent areas so the epoxy can be
extended onto the adjacent grid line as well as the
bus bar. Apply a thin layer of epoxy to the area
where the terminal or pigtail wire was fastened and
onto the adjacent grid line.
(7) Apply a thin layer of conductive epoxy to the
terminal or bare wire end of the pigtail and place it
in the proper location on the bus bar. To prevent the
terminal or pigtail wire from moving while the epoxy
is curing, it must be wedged or clamped.
(8) Carefully remove the masking tape or tem-
plate.
CAUTION: Do not allow the glass surface to exceed
204° C (400° F) or the glass may fracture.
(9) Allow the epoxy to cure 24 hours at room tem-
perature, or use a heat gun with a 260° to 371° C
(500° to 700° F) range for fifteen minutes. Hold the
heat gun approximately 25.4 centimeters (10 inches)
from the repair.
(10) After the conductive epoxy is properly cured,
remove the wedge or clamp from the terminal or pig-
tail wire. Do not attach the wire harness connectors
until the curing process is complete.
(11) Check the operation of the rear window defog-
ger glass heating grid.
Fig. 2 Grid Line Repair - Typical
1 – BREAK
2 – GRID LINE
3 – MASKING TAPE
8N - 4
ELECTRICALLY HEATED SYSTEMS
DN
DIAGNOSIS AND TESTING (Continued)
REMOVAL AND INSTALLATION
DEFOGGER SWITCH
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER
TO
GROUP
8M
-
PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL,
STEERING
COLUMN,
OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the lower bezel from the instrument
panel. See Instrument Panel Lower Bezel in the
Removal and Installation section of Group 8E -
Instrument Panel Systems for the procedures.
(3) Remove the two screws that secure the rear
window switch pod to the instrument panel lower
bezel (Fig. 3).
(4) Remove the rear window switch pod from the
instrument panel lower bezel.
(5) Reverse the removal procedures to install.
Tighten the mounting screws to 2.2 N·m (20 in. lbs.).
Fig. 3 Rear Window Switch Pod Remove/Install
1 – INSTRUMENT PANEL LOWER BEZEL
2 – REAR WINDOW SWITCH POD
3 – SCREWS (2)
DN
ELECTRICALLY HEATED SYSTEMS
8N - 5
POWER DISTRIBUTION SYSTEMS
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
POWER DISTRIBUTION SYSTEM. . . . . . . . . . . . . 1
POWER DISTRIBUTION CENTER . . . . . . . . . . . . . 1
GENERATOR CARTRIDGE FUSE . . . . . . . . . . . . . . 2
JUNCTION BLOCK . . . . . . . . . . . . . . . . . . . . . . . . 2
IGNITION-OFF DRAW FUSE . . . . . . . . . . . . . . . . . 3
RELAY AND FUSE BLOCK . . . . . . . . . . . . . . . . . . 4
REMOVAL AND INSTALLATION
POWER DISTRIBUTION CENTER . . . . . . . . . . . . . 4
GENERATOR CARTRIDGE FUSE . . . . . . . . . . . . . . 6
JUNCTION BLOCK . . . . . . . . . . . . . . . . . . . . . . . . 6
IGNITION-OFF DRAW FUSE . . . . . . . . . . . . . . . . . 7
RELAY AND FUSE BLOCK . . . . . . . . . . . . . . . . . . 8
DESCRIPTION AND OPERATION
POWER DISTRIBUTION SYSTEM
DESCRIPTION
This
group
covers
the
various
standard
and
optional power distribution components used on this
model. The power distribution system for this vehicle
consists of the following components:
• Power Distribution Center (PDC)
• Junction Block (JB)
• Relay and Fuse Block.
The power distribution system also incorporates
various types of circuit control and protection fea-
tures, including:
• Automatic resetting circuit breakers
• Blade-type fuses
• Cartridge fuses
• Circuit splice blocks
• Flashers
• Relays.
Following are general descriptions of the major
components in the power distribution system. See the
owner’s manual in the vehicle glove box for more
information on the features and use of all of the
power distribution system components. Refer to the
index in this service manual for the location of com-
plete circuit diagrams for the various power distribu-
tion system components.
OPERATION
The power distribution system for this vehicle is
designed to provide safe, reliable, and centralized dis-
tribution points for the electrical current required to
operate all of the many standard and optional facto-
ry-installed
electrical
and
electronic
powertrain,
chassis, safety, security, comfort and convenience sys-
tems. At the same time, the power distribution sys-
tem was designed to provide ready access to these
electrical distribution points for the vehicle techni-
cian to use when conducting diagnosis and repair of
faulty circuits. The power distribution system can
also prove useful for the sourcing of additional elec-
trical circuits that may be required to provide the
electrical current needed to operate many accessories
that the vehicle owner may choose to have installed
in the aftermarket.
POWER DISTRIBUTION CENTER
DESCRIPTION
All of the electrical current distributed throughout
this vehicle is directed through the standard equip-
ment Power Distribution Center (PDC) (Fig. 1). The
molded plastic PDC housing is located in the left
Fig. 1 Power Distribution Center Location
1 – CLIP
2 – BATTERY
3 – TRAY
4 – NEGATIVE CABLE
5 – POSITIVE CABLE
6 – CLIP
7 – FENDER INNER SHIELD
8 – POWER DISTRIBUTION CENTER
DN
POWER DISTRIBUTION SYSTEMS
8O - 1
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