Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Dodge Neon 1997.1999.2000.2004 Approved Dodge Neon 1997 EPL_8N
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REAR WINDOW DEFOGGER
PL ELECTRICALLY HEATED SYSTEMS 8N - 1
ELECTRICALLY HEATED SYSTEMS
CONTENTS
page page
DESCRIPTION AND OPERATION GRID LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1 REAR WINDOW DEFOGGER SWITCH . . . . . . . 3
REAR WINDOW DEFOGGER SWITCH . . . . . . . 1 SERVICE PROCEDURES
DIAGNOSIS AND TESTING GRID LINE AND TERMINAL REPAIR . . . . . . . . . 3
DEFOGGER SYSTEM . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
INTRODUCTION model. Whenever required and feasible, the RHD
For proper operation of the Rear Window Defogger versions of affected vehicle components have been
system refer to the Owner's Manual. constructed as mirror-image of the LHD versions.
The system consists of a rear glass with two verti- While most of the illustrations used in this group
cal bus bars and a series of electrically connected represent only the LHD version, the diagnostic and
grid lines fired on the inside surface. A control switch service procedures outlined can generally be
and a timer relay combined into a single assembly is applied to either version. Exceptions to this rule
used on all models (Fig. 1). have been clearly identified as LHD, RHD, or Export
Circuit protection is provided by a maxi fuse, if a special illustration or procedure is required.
located in the Power Distribution Center, for the
heated grid circuit and by a fuse for the relay control
circuit. REAR WINDOW DEFOGGER SWITCH
When the switch is turned to the ON position, cur- The rear window defogger switch is a control
rent is directed to the rear defogger grid lines. The switch and timer relay integrated into a single panel
heated grid lines heat the rear glass to clear the sur- mounted assembly. Actuating the switch energizes
face of fog or frost. the circuit which allows current to flow through the
grid lines. Upon initial actuation for approximately
CAUTION: Grid lines can be damaged or scraped eight to ten minutes, or until either the switch or
off with sharp instruments, care should be taken in ignition is turned off. An indicating lamp illuminates
cleaning glass or removing foreign materials, a lens inlaid in the control switch.
decals or stickers. Normal glass cleaning solvents
or hot water used with rags or toweling is recom-
DIAGNOSIS AND TESTING
mended.
DEFOGGER SYSTEM
Electrically heated rear window defogger operation
can be checked in vehicle in the following manner:
(1) Turn ignition switch to the ON position.
(2) Connect an ammeter in series with the battery.
Push the defogger control switch to the ON position.
A distinct increase in amperage draw should be
noted.
(3) The rear window defogger operation can be
checked by feeling the glass. A distinct difference in
temperature between the grid lines and adjacent
clear glass can be detected in three to four minutes
of operation.
(4) Using a DC voltmeter, connect negative lead to
Point B, and the positive lead to Point A (Fig. 2). The
voltmeter should read 10-14 volts.
Fig. 1 Rear Window Defogger
GROUND PARCEL SHELF TRIM COVER
MID-POINTDEFOGGER
"B'' C.H.M.S.L.
REAR "C''
WINDOW PICK-UP
LEADS BARS VOLTAGE FEED "A'' VEHI-
BUS
VOLTMETER
CLE
VIEW FROM INSIDE TO IGNITION POINT A
CONNEC-SWITCH
FUSE
TO
TOR
POWER HEADLAMPBATTERY REAR WINDOWSTRUCTURE
CAL) LINE
GRID
MIDPOINT (TYPI- ON/OFF ON SWITCH RELAY
GROUND LED
B NECTOR
CON-
POINT INDICATING
8N - 2 ELECTRICALLY HEATED SYSTEMS PL
DIAGNOSIS AND TESTING (Continued)
(5) Step 2, Step 3 or Step 4 above will confirm occur in an individual grid line resulting in no cur-
system operation. Indicator light illumination means rent flow through the line. To detect breaks in grid
that there is power available at the output of the lines the following procedure is required:
relay only, and does not necessarily verify system (1) Turn ignition ON and turn control switch to
operation. ON. The indicator light should come on.
(6) If turning the switch ON produced no distinct (2) Using a DC voltmeter with 0-15 volt range,
current draw on the ammeter the problem should be contact terminal B with negative lead of voltmeter.
isolated in the following manner: With positive lead of voltmeter, contact terminal A
(a) Confirm the ignition switch is ON. (Fig. 2). The voltmeter should read 10-14 volts. A
(b) Ensure that the heated rear glass feed wire lower voltage reading indicates a poor connection in
is connected to the terminal or pigtail and that the the feed or the ground circuit.
ground wire is in fact grounded. (3) With negative lead of voltmeter, contact a good
(c) Ensure that the maxi-fuse and control circuit body ground point. The voltage reading should not
fuse are OK and all electrical connections are change.
secure. (4) Connect negative lead of voltmeter to terminal
(7) When the above steps have been completed and B and touch each grid line at Mid-Point with Positive
the system is still inoperative, one or more of the fol- lead. A reading of:
lowing is defective: ◦ Jabse Service Manual Search 2023 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo