electrically heated systems

8/14/2019 Electrically Heated Systems

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ELECTRICALLY HEATED SYSTEMS

CONTENTS

page page

GENERAL INFORMATION

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1

DESCRIPTION AND OPERATION

DEFOGGER RELAY . . . . . . . . . . . . . . . . . . . . . . . 2

DEFOGGER SWITCH . . . . . . . . . . . . . . . . . . . . . . 1

INSTRUMENT CLUSTER . . . . . . . . . . . . . . . . . . . 2

REAR GLASS HEATING GRID . . . . . . . . . . . . . . 1

DIAGNOSIS AND TESTING

DEFOGGER RELAY . . . . . . . . . . . . . . . . . . . . . . 4

DEFOGGER SWITCH . . . . . . . . . . . . . . . . . . . . . . 3

DEFOGGER SYSTEM . . . . . . . . . . . . . . . . . . . . . 2

INSTRUMENT CLUSTER . . . . . . . . . . . . . . . . . . . 4

REAR GLASS HEATING GRID . . . . . . . . . . . . . . 3

SERVICE PROCEDURES

REAR GLASS HEATING GRID REPAIR . . . . . . . . 5

REMOVAL AND INSTALLATION

DEFOGGER RELAY . . . . . . . . . . . . . . . . . . . . . . . 6

DEFOGGER SWITCH . . . . . . . . . . . . . . . . . . . . . . 6

GENERAL INFORMATION

INTRODUCTION

An e le ct r i ca l ly h e a t e d r e a r w in d ow d e fog ge r i s

available as factory-installed equipment on models

equipped with the hardtop option. The defogger will

on l y o pe r a t e w h e n t h e i gn i t ion s w it ch i s i n t h e O n

position. When the defogger switch is in the On posi-

tion, an electric heater grid on the rear window glass

i s e n e r gi ze d . T h i s g r id p r od u ce s h e a t t o h e lp cl ea r

the rear window glass of ice, snow, or fog.

T h e d efog ge r s ys t e m i s con t r o ll ed b y a s w it ch

located in the accessory switch bezel, which is n ear

the bottom of the instrument panel center bezel and

next to the ash receiver. An amber indicator lamp in

t h e s wit ch b u t t on w ill l igh t t o in d ica t e w h en t h e

defogger system is tu rned on. The instru ment cluster

circuitry, which conta ins the defogger system timer

log ic, m on it or s t h e s t a t e of t h e d efog ge r s wit ch

t h r o u g h a h a r d - w i r e d i n p u t . T h e i n s t r u m e n t c l u s t e r

ci r cu i t r y con t r o ls t h e d e fog ge r s ys t e m t h r o u gh a

hard-wired control output to the defogger relay.

The defogger system will be aut omatically turn ed

off a ft e r a p r og r a m m ed t i m e i n t e r v a l o f a b ou t t e n

minutes. After the initial t ime interval has expired, if

t h e d e fog ge r s w it ch i s t u r n e d on a g a in d u r i n g t h esame ignition cycle, the defogger system will a uto-

matically turn off after about five minutes.

The defogger system will automatically shut off if the

ignition switch is turned to the Off position, or it can be

turn ed off manua lly by depressing th e instrum ent panel

switch. Refer to t he owners manu al for more informa-

tion on the defogger system controls and operation.

F ol low in g a r e g en e r a l d e scr i pt i on s of t h e m a j or

components in the defogger system. Refer to 8W-48 -

Rear Window Defogger in Group 8W - Wiring Dia-

grams for complete circuit descriptions and diagrams.

DESCRIPTION AND OPERATION

REAR GLASS HEATING GRID

The heated rear window glass has two electrically

conductive vertical bus bars and a series of horizon-

t a l g ri d lin e s m a d e of a s ilve r-ce r a mic m a t e ri al ,

which is baked on and bonded to the inside surface of

t h e gl a ss . T h e g ri d lin e s a n d b u s b a r s com p r is e a

par allel electr ical circuit.

When the rear window defogger switch is placed in

the On position, electrical current is directed to th e

r e a r w in d ow gr id lin e s t h r ou gh t h e b u s b a r s. T h e

g r i d l i n e s h e a t t h e r e a r w i n d o w t o c l e a r t h e s u r f a c e

of fog or snow. P rotection for the heat ed grid circuit

is provided by a fuse in the Power Distribution Cen-

ter (PDC).

T h e g r id l in e s a n d b u s b a r s a r e h i gh l y r e s is t a n t t o

abra sion. However, it is possible for an open circuit

t o o ccu r i n a n i n di vi du a l g r id l in e , r e s u l t in g i n n o

current flow through the l ine.

The grid l ines can be damaged or scraped off with

sharp instruments. Care should be taken when clean-

ing t he glass or removing foreign materials, decals,

or stickers from the glass. Normal glass cleaning sol-

vents or hot water used with rags or toweling is rec-

ommended.A repair kit is available to repair th e grid l ines a nd

b u s b a r s, or t o r e in s t a ll t h e h e a t ed gla s s p igt a il

wires.

DEFOGGER SWITCH

The rear window defogger switch is mounted in the

accessory switch bezel, which is located in the lower

in s tr u m en t p a ne l ce nt er b eze l, n ext t o t h e a s h

r e ce iv er . T h e m om e n t a r y -t y pe s w it ch p r ov id e s a

h a r d -w ir e d g r ou n d s ig n a l t o t h e i n st r u m e n t cl u s t er

e a ch t im e it is d ep r es s ed . T h e in s t r u m en t cl u st e r

T J ELECTRICALLY HEATED SYSTEMS 8N - 1


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r e a r w in d ow d efog ge r t im e r a n d logic cir cu it r y

responds by energizing or de-energizing the rear win-

dow d efogger rela y.

E n e r g iz in g t h e r e a r w in d ow d e fog ge r r e la y p r o-

vides electrical current to the rear window defogger

g rid a n d t h e a m b er in d ica t or l a mp in t h e s wit ch ,

which l ights to indicate when the defogger system isturned On. The defogger i l lumination lamp and indi-

cator lamp bulbs are serviceable. The defogger switch

cannot be repaired and, if faulty or damaged, i t must

be replaced.

INSTRUMENT CLUSTER

T h e i n st r u m e n t cl u st e r i s a n e le ct r om e ch a n i ca l

u n i t t h a t con t a i n s i n t eg r a t ed ci r cu i t r y a n d i n t er n a l

programm ing to perform a variety of functions. The

i n st r u m e n t cl u st e r ci r cu i t r y m on i t or s h a r d -w ir e d

s w it ch i n p u t s, a s w el l a s m e s sa g e i n pu t s r e ce iv ed

from other vehicle electronic contr ol modules on the

Chrysler Collision Detection (CCD) data bus network.T h e i n s t r u m en t clu s t er u s es t h e se m a n y in p u t s

a lon g w it h it s in t e r n a l p r og ra m m in g a n d in t e gr a l

timer and logic circuitry to perform the functions of

the rear window defogger t imer on this model. The

instrument cluster circuitry also has a self-diagnostic

ca p a bilit y. R efe r t o G r ou p 8 E - I n st r u m en t P a n e l

Systems for more information on this feature.

However, there are no diagnostics available for the

r e a r w in d ow d e fog ge r t i m er a n d l og ic ci r cu i t r y.

Therefore, the diagnosis for this system consists of

confirming the presence of a rear window defogger

switch input signal at the instrument cluster connec-

t or , a n d t h e r e s u lt i n g r e a r w in d ow d e fog ge r r e la ycontrol output signal at the defogger relay. For diag-

n os is o f t h e C C D d a t a b u s a n d t h e d a t a b u s m e s s a ge

i n pu t s , a D RB s ca n t ool a n d t h e p r op e r D ia g n os t ic

Procedures manual are recommended.

Refer to Group 8E - Instrument Panel Systems for

t h e s e r vi ce p r oce d u r es for t h e i n st r u m e n t cl u s t er .

The rear window defogger t imer and logic circuitry

cannot be adjusted or repaired and, if faulty or dam-

a ged , t h e in s tr u m en t clu s te r a s se mb ly m u st b e

replaced.

DEFOGGER RELAY

The rear window defogger relay is a International

Standa rds Organization (ISO)-type relay. The rear

window defogger relay is a electromechanical device

t h a t s w it ch e s f u s ed b a t t e r y cu r r e n t t o t h e r e a r g la s s

heating grid and the indicator lamp of the defogger

s wi tch , w h en t h e in s t r u m en t clu s t er r e a r w in d ow

defogger t imer and logic circuitry grounds the relay

coil. See the Diagnosis and Testing section of t his

group for more informat ion on the operation of th e

rear window defogger relay.

The rear window defogger relay is located in the

Power Distribution Center (PDC) in the engine com-

partment. Refer to the PDC label for relay identifica-

tion and location.

The rear window defogger relay cannot be repaired

and, if faulty or damaged, i t must be replaced.

DIAGNOSIS AND TESTING

DEFOGGER SYSTEM

F or cir cu it d es cr ip t ion s a n d d ia g ra m s , r e fe r t o

8W-48 - Rear Window Defogger in Group 8W - Wir-

i n g D ia gr a m s . T h e op er a t ion of t h e e le ct r ica lly

h e a t e d r e a r w in d ow d e fog ge r s ys t e m ca n b e con -

firmed in one of the following manners:

1 . Tu r n t h e ig n it ion s wi tch t o t h e O n p os it ion .

While monitoring the instrument panel voltmeter, set

t h e d e fog ge r s w it ch i n t h e O n p os it i on . W h en t h e

d e fog ge r s w it ch i s t u r n e d O n , a d is t in ct v ol t m et e rneedle deflection should be noted.

2. Turn the ignition switch to th e On position. Set

the defogger switch in the On position. The rear win-

dow defogger operation can be checked by feeling the

rear window glass. A distinct difference in tempera-

t u r e b et w ee n t h e g r id l in e s a n d t h e a d ja ce n t cl ea r

glass can be detected within three to four minutes of

operation.

3. Using a 12-volt DC voltmeter, contact the rear

g la s s h e a t in g g r id t e r m in a l A (r i gh t s id e ) w it h t h e

negative lead, and terminal B (left side) with the pos-

it ive lead (Fig. 1). The voltmeter should read battery

voltage.

The above checks will confirm system operation.

Illumination of the defogger switch indicator lamp

means that there is electrical current available at the

output of th e defogger relay, but does not confirm

t h a t t h e e l e c t r i c a l c u r r e n t i s r e a c h i n g t h e r e a r g l a s s

heating grid l ines.

Fig. 1 Rear Window Glass Grid Test

8N - 2 ELECTRICALLY HEATED SYSTEMS T J

DESCRIPTION AND OPERATION (Continued)


3/6

If the defogger system does n ot operate, t he prob-

lem should be isolated in the following manner:

(1 ) C on fi r m t h a t t h e i gn i t ion s w it ch i s i n t h e O n

position.

(2 ) E n s u r e t h a t t h e r e a r gla s s h e a t in g g r id fe ed

and ground wires are connected to th e glass. Confirm

t h a t t h e g r ou n d w ir e h a s con t i n u it y t o g r ou n d .(3) Check the fuses in the Power Distribution Cen-

t e r (P D C ) a n d i n t h e fu s e bl ock m od u le . T h e fu s e s

m u s t b e t i gh t i n t h e ir r e ce p t a cl es a n d a l l e l ect r i ca l

connections must be secure.

When the above steps have been completed an d t he

r e a r g la s s h e a t in g g r id i s s t il l i n op e r a t iv e, on e or

more of the following is faulty:

Defogger switch

Defogger relay

Instrument cluster circuitry

R ea r w in d ow g r id l in e s (a l l g r id l in e s w ou l d

h a v e t o b e b r o k en or on e of t h e fe ed w ir e s d is con -

nected for the entire system to be inoperative).I f s e t t i n g t h e d e fog ge r s w it ch t o t h e O n p os it i on

produces a severe voltmeter deflection, check for a

short circuit between the defogger relay output and

t h e r e a r g la s s h e a t in g g r i d .

REAR GLASS HEATING GRID

F or cir cu it d es cr ip t ion s a n d d ia gr a m s , r e fe r t o


ing Diagrams. To detect breaks in the grid l ines, 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 l ight. If OK, go to Step 2. If n ot OK, seethe Defogger Relay diagnosis in this group.

(2) Using a 12-volt DC voltmeter, conta ct 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 t he negative lead of the voltmeter to

t h e r ig ht s id e b u s b a r a n d t ou ch e a ch g rid l in e a t

m id poin t C w it h t h e p os it ive l ea d . A r e a di n g of

a p p r ox im a t e ly s ix v ol t s i n di ca t e s a l in e i s g ood . A

r e a d in g of z e r o v ol t s i n d ica t e s a b r e a k i n t h e g r id

line between midpoint C and the left side bus bar. A

r e a d in g of t e n t o fou r t e e n v ol t s i n di ca t e s a b r ea k

between midpoint C and the right side bus bar. Move

t h e p o s i t i v e l e a d o n t h e g r i d l i n e t o w a r d s t h e b r e a k

a n d t h e v o l t a g e r e a d i n g w i l l c h a n g e a s s o o n a s t h e

break is crossed.

DEFOGGER SWITCH

F or cir cu it d es cr ip t ion s a n d d ia g ra m s , r e fe r t o


ing Diagrams.

WARNING: ON VEHICLES EQUIPPED WITH AIR-

BAGS, REFER TO GROUP 8M - PASSIVERESTRAINT SYSTEMS BEFORE ATTEMPTING ANYSTEERING WHEEL, STEERING COLUMN, OR

INSTRUMENT PANEL COMPONENT DIAGNOSIS ORSERVICE. FAILURE TO TAKE THE PROPER PRE-CAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONAL

INJURY.

(1 ) D is con n e ct a n d i sol a t e t h e b a t t e r y n e ga t i ve

cable. Remove the accessory switch bezel and unplug

the defogger switch wire harness connector.

(2) Check for continuity between the ground cir-

cuit cavity of t he defogger switch wire h arn ess con-n ect or a nd a good gr ou nd. Th er e sh ou ld be

continuity. If OK, go to Step 3. If not OK, repair the

open circuit as required.

(3) Check for continuity between the ground cir-

cuit and rear window defogger switch sense circuit

terminals on the back of the switch housing (Fig. 2).

There should be momentary continuity as the defog-

ger switch button is depressed, and then no continu-

i ty. I f O K, s ee t h e d ia gn os is for t h e I n st r u m en t

C lu s t e r i n t h i s g r ou p . I f n ot O K, r e p la ce t h e fa u l t y

switch.

Fig. 2 Defogger Switch Continuity


DIAGNOSIS AND T ESTING (Continued)


4/6

DEFOGGER RELAY

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO GROUP 8M - PASSIVERESTRAINT SYSTEMS BEFORE ATTEMPTING ANY

STEERING WHEEL, STEERING COLUMN, OR

INSTRUMENT PANEL COMPONENT DIAGNOSIS ORSERVICE. FAILURE TO TAKE THE PROPER PRE-CAUTIONS COULD RESULT IN ACCIDENTAL AIR-

BAG DEPLOYMENT AND POSSIBLE PERSONALINJURY.

RELAY TEST

The defogger relay (Fig. 3) is located in the Power

D is t r ib u t ion C en t e r (P D C ), i n t h e e n gi n e com p a r t -

m e n t . R em ov e t h e d e fog ge r r e la y fr om t h e P D C a s

described in this group to perform the following tests:

(1 ) A r e la y i n t h e d e -e n e r gi ze d p os it i on s h ou l d

h a v e con t i n u it y b et w ee n t e r m in a l s 8 7A a n d 3 0, a n dno continuity between term inals 87 an d 30. If OK, go

to Step 2. If not OK, replace the faulty relay.

(2) Resistance between terminals 85 and 86 (elec-

t r om a g n e t ) s h ou l d b e 7 5 1 0 o h m s . I f O K , g o t o

Step 3. If not OK, replace the faulty relay.

(3 ) C on n ect a b at t er y t o t er m in a ls 8 5 a n d 8 6.

T h e r e s h ou l d n ow b e con t i n u it y b et w ee n t e r m in a l s

30 and 87, and no continuity between terminals 87A

a n d 3 0. I f O K, s ee t h e R ela y C ir cu it Te st in t h is

group. If not OK, replace the faulty relay.

RELAY CIRCUIT TEST

(1) The relay common feed terminal cavity (30) is

connected to battery voltage and should be hot at all

t imes. If OK, go to Step 2. If not OK, repair the open

circuit to the PDC fuse as required.

(2 ) T h e r e la y n or m a l ly cl os ed t e r m in a l (8 7A) i s

connected to terminal 30 in the de-energized position,

but is not used for this application. Go to Step 3.

(3) The relay normally open terminal (87) is con-

nected to the common feed terminal (30) in the ener-

gized position. This terminal supplies battery voltage

t o t h e r ea r gla s s h ea t in g gr id a n d t h e d efogger

s w it ch i n di ca t or l a m p . T h e r e s h ou l d b e con t i n u it y

between the cavity for relay terminal 87 and the rear

window defogger relay output circuit cavities of therear glass heating grid and defogger switch connec-

t or s a t a ll t im es . I f O K, go t o S t e p 4. I f n ot O K,

repair the open circuit(s) as required.

(4) The coil batt ery terminal (86) is connected t o

the electromagnet in the relay. This terminal is pro-

vid ed w it h gr ou n d b y t h e i n st r u m en t cl u st e r r e a r

window defogger timer and logic circuitry to energize

t h e d e fog ge r r e la y. T h er e s h ou l d b e con t i n u it y t o

g r o u n d a t t h e c a v i t y f o r r e l a y t e r m i n a l 8 6 w h e n t h e

d efog ge r s w it ch i s t u r n e d O n . H ow ev er , w i t h t h e

defogger relay removed, the defogger switch indicator

lamp will not l ight to show that the defogger system

is turned On. Be certain that you depress the defog-ger switch at least twice to confirm that the system

i s t u r n e d o n d u r i n g t h i s t e s t . I f O K , g o t o S t e p 5 . I f

n ot O K, r e pa ir t h e op en cir cu it t o t h e in s t r u m en t

cluster as required.

(5) The coil ground terminal (85) is connected t o

t h e e le ct r om a g n e t i n t h e r e la y. I t i s con n e ct e d t o

fused ignition switch output voltage an d should be

h ot w h e n t h e i gn i t ion s w it ch i s i n t h e O n p os it i on .

Check for battery voltage at the cavity for relay ter-

minal 85 with the ignition switch in the On position.

I f O K , s e e t h e d ia g n os is for I n s t r u m e n t C lu s t e r i n

t h i s g r o u p . I f n o t O K , r e p a i r t h e o p e n c i r c u i t t o t h e

fuse in the fuseblock module as required.

INSTRUMENT CLUSTER

Before performing this test, complete the Defogger

Switch and the Defogger Relay tests as described in

t h i s g r ou p . F or ci r cu i t d e scr i pt i on s a n d d ia g r a m s ,

refer to 8W-48 - Rear Window Defogger in Group 8W

- Wiring Diagrams.

WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO GROUP 8M - PASSIVERESTRAINT SYSTEMS BEFORE ATTEMPTING ANYSTEERING WHEEL, STEERING COLUMN, OR

INSTRUMENT PANEL COMPONENT DIAGNOSIS ORSERVICE. FAILURE TO TAKE THE PROPER PRE-CAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONALINJURY.


cable. Remove the defogger relay from the Power Dis-

t r ib u t ion C en t e r (P D C) a n d u n p lu g t h e d efog ge r

switch wire harness connector.

Fig. 3 Defogger Relay




5/6

(2) Remove the instrument cluster from the instru-

ment panel. Refer to Instrument Cluster in Group 8E

- Instrument Panel Systems for the procedures.

(3) Check for continuity between the rear window

d e fog ge r s w it ch s e n se ci r cu i t ca v it y of t h e r i gh t

instrument cluster wire harness connector (connector

B) and a good ground. There should be no continuity.If OK, go to Step 4. If not OK, repair the short circuit

as required.


defogger switch sense circuit cavities of the right


B) and the defogger switch wire harn ess connector.

There should be continuity. If OK, go to Step 5. If not

OK, repair the open circuit as required.


d e fog ge r r e la y con t r o l ci r cu i t ca v it y of t h e r i gh t


B) and a good ground. There should be no continuity.

If OK, go to Step 6. If not OK, repair the short circuitas required.


defogger relay control circuit cavities of the right


B) an d the defogger relay receptacle (the cavity for

I S O r e l a y t e r m i n a l 8 6 ) in t h e P D C . T h e r e s h ou l d b e

continuity. If OK, replace the faulty instrument clus-

ter. If not OK, repair the open circuit as required.

SERVICE PROCEDURES

REAR GLASS HEATING GRID REPAIRR ep a ir of t h e r e a r g la s s h e a t in g g rid l in e s, b u s

b a r s , or p ig t a il w ir e s ca n b e a ccom p li sh e d u s in g a

M op a r R ea r Win d ow D efogg er R ep a ir K it (P /N

4267922) or equivalent.

WARNING: MATERIALS CONTAINED IN THE

REPAIR KIT MAY CAUSE SKIN OR EYE IRRITATION.THE KIT CONTAINS EPOXY RESIN AND AMINETYPE HARDENER, WHICH ARE HARMFUL IF SWAL-LOWED. AVOID CONTACT WITH THE SKIN AND

EYES. FOR SKIN CONTACT, WASH THE AFFECTEDAREAS 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 PHYSICIANIMMEDIATELY. USE WITH ADEQUATE VENTILA-TION. DO NOT USE NEAR FIRE OR FLAME. CON-TAINS FLAMMABLE SOLVENTS. KEEP OUT OF THEREACH OF CHILDREN.

(1 ) M a sk t h e r e pa ir a r e a s o t h a t t h e con d u ct iv e

epoxy can be applied neatly. Extend the epoxy appli-

cation onto the grid l ine or the bus bar on each side

of the break (Fig. 4).

(2 ) F ol low t h e i n st r u c t ion s i n t h e r e p a ir k i t for

p r e p a r i n g t h e d a m a g e d a r e a .

(3) Remove the package separator clamp and mix

t h e t w o con d u ct i ve e p ox y com p on e n t s t h or ou g h ly

w i t h i n t h e p a c k a g i n g . F o l d t h e p a c k a g e i n h a l f a n dcut the center corner to dispense the epoxy.

(4) F or gr id lin e r ep a ir s , m a sk t h e a r ea t o b e

r e p a ir e d w i t h m a s k in g t a p e o r a t e m p la t e .

( 5 ) A p p l y t h e e p o x y t h r o u g h t h e s l i t i n t h e m a s k -

ing tape or template. Overlap both ends of the break

by at least 19 mm (0.75 in.).

(6 ) F or a t e r min a l or p ig ta il w ir e r e pl ace m en t ,

m ask t he a dja cen t a rea s so t he epoxy ca n be

e x t e n d e d o n t o t h e a d j a c e n t g r i d l i n e a s w e l l a s t h e

b u s b a r. A pp ly a t h in la y er of e p ox y t o t h e a r e a

w h er e t h e t e r m in a l or p ig t a il w i r e w a s fa s t e n ed a n d

onto the adjacent grid l ine.

(7) Apply a thin layer of conductive epoxy to thet e r m in a l or b a r e w i r e e n d of t h e p ig t a il a n d p la ce i t

in the proper location on the bus bar. To prevent the

terminal or pigtail wire from moving while the epoxy

is curing, i t must be wedged or clamped.

(8 ) Ca r e fu lly r e mov e t h e m a s k in g t a p e or t e m -

plate.

CAUTION: Do not allow the glass surface to exceed204 C (400 F) or the glass may fracture.

(9) Allow t he epoxy to cure 24 hours a t room tem-

p er a t u r e , or u s e a h e a t g u n w it h a 2 60 t o 37 1 C

(500 to 700 F) range for fifteen minutes. Hold theh e a t g u n a p p r ox im a t e ly 2 5.4 c m (1 0 i n .) f r om t h e

repair.

(10) After the condu ctive 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 th e operation of the r ear window defog-

ger glass heating grid.

Fig. 4 Grid Line Repair - Typical




6/6

REMOVAL AND IN STALLATI ON

DEFOGGER SWI TCH

WARNING: ON VEHICLES EQUIPPED WITH AIR-

BAGS, REFER TO GROUP 8M - PASSIVE

RESTRAINT SYSTEMS BEFORE ATTEMPTING ANYSTEERING WHEEL, STEERING COLUMN, ORINSTRUMENT PANEL COMPONENT DIAGNOSIS OR

SERVICE. FAILURE TO TAKE THE PROPER PRE-CAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONALINJURY.


cable.

(2 ) R e m ov e t h e ce n t e r b ez el fr om t h e i n s t r u m en t

p a n e l . S e e I n s t r u m e n t P a n e l C e n t e r B e z e l i n G r o u p

8E - Instrument Panel Systems for the procedures.

(3) Remove the four screws that secure the acces-sory switch bezel to the instrument panel (Fig. 5).

(4 ) P u l l t h e a cce s sor y s w it ch b ez el ou t fr om t h e

i n s t r u m e n t p a n e l f a r e n o u g h t o a c c e s s t h e w i r e h a r -

ness connectors.

(5 ) U n p l u g t h e w ir e h a r n e s s con n e ct or s fr om t h erear of the accessory switches and the cigar l ighter/

power outlet.

(6 ) R e m ov e t h e a cce s sor y s w it ch b ez el fr om t h e

instrument panel.

(7) With a small thin-bladed screwdriver, gently

p r y t h e s n a p c l i p s a t t h e t o p a n d b o t t o m o f t h e r e a r

window defogger switch receptacle on the back of the

accessory switch bezel an d pull the switch out of th e

bezel.(8) Reverse the removal procedures to install. Be

certain that both of the switch snap clip retainers in

t h e r e ce p t a cl e on t h e b a ck of t h e a cce s sor y s w it ch

bezel are fully engaged. Tighten the mounting screws

to 2.2 Nm (20 in. lbs.).

DEFOGGER RELAY


cable.

(2) Remove t he cover from t he Power Distribut ion

Center (PDC) (Fig. 6).

(3 ) Re fe r t o t h e la b el on t h e P D C for d efog ge r

relay identification and location.

(4) Unplug th e defogger relay from th e P DC.

(5) Install th e defogger relay by a ligning the relay

t e r m i n a l s w i t h t h e c a v i t i e s i n t h e P D C a n d p u s h i n g

the relay firmly into place.

(6) Install t he PDC cover.(7) Connect t he battery negative cable.

(8) Test the relay operation.

Fig. 5 Accessory Switch Bezel Remove/Install

Fig. 6 Power Distribution Center


electrically heated systems

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