Chrysler 300M 2002 Service Manual page 226

LH
REAR WINDOW ANTENNA (Continued)
Fig. 3 REAR WINDOW GLASS - TYPICAL
1 - REAR WINDOW GLASS
2 - URETHANE
3 - CLIP
4 - MOLDING
(12) After urethane has cured, water test rear win-
dow to verify repair. Verify rear window defogger
operation. (Refer to 8 - ELECTRICAL/HEATED
GLASS - OPERATION).
REAR WINDOW ANTENNA
MODULE
DESCRIPTION
The integrated rear window antenna incorporates
the rear window defogger and a electronic module to
receive radio signals. The module is located in the
right C-pillar behind the trim panel (Fig. 4).
OPERATION
The AM and FM signals are received via isolated
unheated lines along the top of the rear window.
NOTE: If aftermarket window shading is added, it
cannot be of the metallic type. Metallic type window
shading can cause poor radio reception.
NOTE: If an accessory cellular phone glass mount
antenna is installed, it should only be installed so
as to avoid contact with any of the rear glass grid
lines.
Fig. 4 Rear Defogger/Antenna Module
1 - TO RADIO
2 - TO BACKLITE
3 - REAR DEFOGGER/ANTENNA MODULE
4 - REAR SEAT
DIAGNOSIS AND TESTING - REAR WINDOW
ANTENNA MODULE
NOTE: Due to a capacitor integral with the coaxial
cable, the coax cable can not be tested. The conti-
nuity test between the center pin of the coax to the
antenna does not apply. An ohm meter check to the
center pin of the coaxial cable will falsely indicate
an open circuit. The coaxial shield to ground test
can be performed. Verify coaxial cable performance
by using a known good cable.
Before performing any antenna service procedures,
verify that Rear Window Defogger is operating prop-
erly (Fig. 5) and (Fig. 6). If no, repair as necessary.
(Refer to 8 - ELECTRICAL/HEATED GLASS - DIAG-
NOSIS AND TESTING). Any repairs to either the
AM or FM grid should be preformed as in Electri-
cally Heated Systems, Grid Line and Terminal
Repair.
(1) Check that the rear window adhesive does not
come in contact with any portion of the grid lines or
bus bars. There should be a minimum of 2 mm gap
between adhesive and the grid lines or bus bars. If
not OK, repair as necessary. If OK, go to Step 2.
AUDIO 8A - 7