Power Window System; Circuit Breaker; Door Module; Power Window Motor - Jeep Cherokee 1999 Electronic Service Manual

8S - 2 POWER WINDOW SYSTEMS
DESCRI PT I ON AN D OPERAT I ON (Cont inue d)
bet ween t h e t er m in a ls of t h e power win dow m ot or.
Th e pa ssen ger side fr on t door a n d, on fou r-door m od-
els, bot h r ea r door power win dow swit ch es r eceive
t h eir ba t t er y feed t h r ou gh t h e power win dow lockou t
swit ch or t h r ou gh t h e m a st er swit ch es in t h e DDM.
Also, ea ch of t h e in dividu a l power win dow swit ch es
r eceives it s gr ou n d t h r ou gh t h e DDM. Wh en t h e lock-
ou t swit ch is pla ced in t h e Lock posit ion , t h e in divid-
u a l power win dow swit ch es becom e in oper a t ive
beca u se t h ey h a ve n o ba t t er y cu r r en t a va ila ble t o
t h em . H owever, t h e m a st er swit ch es a r e u n a ffect ed
by t h e lockou t swit ch posit ion .
E a ch power win dow swit ch , except t h e lockou t
swit ch , is illu m in a t ed by a Ligh t -E m it t in g Diode
(LE D) wh en t h e ign it ion swit ch is t u r n ed t o t h e On
posit ion . H owever, wh en t h e power win dow lockou t
swit ch is pla ced in t h e Lock posit ion , t h e LE D for t h e
locked-ou t pa ssen ger side fr on t a n d, on fou r-door
m odels, t h e r ea r pa ssen ger door power win dow
swit ch es is t u r n ed off.
Th e fr on t door power win dow swit ch es a n d t h eir
la m ps ca n n ot be r epa ir ed a n d, if fa u lt y or da m a ged,
t h e en t ir e door m odu le m u st be r epla ced. Th e r ea r
door power win dow swit ch es a n d t h eir la m ps ca n n ot
be r epa ir ed bu t , if fa u lt y or da m a ged, on ly t h e
a ffect ed swit ch u n it m u st be r epla ced.

DOOR MODULE

A Dr iver Door Modu le (DDM) a n d a P a ssen ger
Door Modu le (P DM) a r e u sed on a ll m odels equ ipped
wit h power locks a n d power win dows. E a ch door
m odu le h ou ses bot h t h e fr on t door power lock a n d
power win dow swit ch es. In a ddit ion t o t h e swit ch es
for it s own door, t h e DDM h ou ses in dividu a l swit ch es
for ea ch pa ssen ger door power win dow, a power win -
dow lockou t swit ch , t h e power m ir r or swit ch , a n d cir-
cu it r y t o su ppor t t h e on e-t ou ch down fea t u r e of t h e
dr iver side fr on t door power win dow. Th e P DM a lso
h ou ses t h e con t r ol cir cu it r y a n d t h e power lock a n d
u n lock r ela ys for t h e power lock syst em .
Th e DDM a n d t h e P DM a r e m ou n t ed t o t h eir
r espect ive fr on t door t r im pa n els. Th e DDM a n d
P DM a r e ser viced
r epa ir ed. If t h e DDM or P DM, or a n y of t h e swit ch es
a n d cir cu it r y t h a t t h ey con t a in a r e fa u lt y or da m -
a ged, t h e com plet e DDM or P DM u n it m u st be
r epla ced.

POWER WINDOW MOTOR

A per m a n en t m a gn et r ever sible m ot or m oves t h e
win dow r egu la t or t h r ou gh a n in t egr a l gea r box m ech -
a n ism . A posit ive a n d n ega t ive ba t t er y con n ect ion t o
t h e t wo m ot or t er m in a ls will ca u se t h e m ot or t o
r ot a t e in on e dir ect ion . Rever sin g t h e cu r r en t
t h r ou gh t h ese sa m e t wo con n ect ion s will ca u se t h e
m ot or t o r ot a t e in t h e opposit e dir ect ion .
in dividu a lly a n d ca n n ot
In a ddit ion , ea ch power win dow m ot or is equ ipped
wit h a n in t egr a l self-r eset t in g cir cu it br ea ker t o pr o-
t ect t h e m ot or fr om over loa ds. Th e power win dow
m ot or a n d gea r box a ssem bly ca n n ot be r epa ir ed a n d,
if fa u lt y or da m a ged, t h e en t ir e power win dow r egu -
la t or a ssem bly m u st be r epla ced.

CIRCUIT BREAKER

An a u t om a t ic r eset t in g cir cu it br ea ker in t h e ju n c-
t ion block is u sed t o pr ot ect t h e power win dow sys-
t em cir cu it . Th e cir cu it br ea ker ca n pr ot ect t h e
syst em fr om a sh or t cir cu it , or fr om a n over loa d con -
dit ion ca u sed by a n obst r u ct ed or st u ck win dow gla ss
or r egu la t or.
Th e cir cu it br ea ker ca n n ot be r epa ir ed a n d, if
fa u lt y, it m u st be r epla ced.
DI AGN OSI S AN D T EST I N G

POWER WINDOW SYSTEM

F or cir cu it descr ipt ion s a n d dia gr a m s, r efer t o
8W-60 - P ower Win dows in Gr ou p 8W - Wir in g Dia -
gr a m s.
ALL WINDOWS INOPERA TIVE
(1) Ch eck t h e cir cu it br ea ker in t h e ju n ct ion block,
a s descr ibed in t h is gr ou p. If OK, go t o St ep 2. If n ot
OK, r epla ce t h e fa u lt y cir cu it br ea ker.
(2) Discon n ect a n d isola t e t h e ba t t er y n ega t ive
ca ble. Rem ove t h e dr iver side fr on t door t r im pa n el
a n d u n plu g t h e Dr iver Door Modu le (DDM) wir e h a r-
n ess con n ect or s fr om t h e DDM. Ch eck for con t in u it y
bet ween t h e gr ou n d cir cu it ca vit y of t h e 8-wa y DDM
wir e h a r n ess con n ect or a n d a good gr ou n d. If OK, go
t o St ep 3. If n ot OK, r epa ir t h e cir cu it t o gr ou n d a s
r equ ir ed.
(3) Con n ect t h e ba t t er y n ega t ive ca ble. Tu r n t h e
ign it ion swit ch t o t h e On posit ion . Ch eck for ba t t er y
volt a ge a t t h e m a st er swit ch power feed (r u n /a cc) cir-
cu it ca vit y of t h e 12-wa y DDM wir e h a r n ess con n ec-
t or. If OK, see t h e dia gn osis for t h e Door Modu le in
t h is gr ou p. If n ot OK, r epa ir t h e open cir cu it t o t h e
be
cir cu it br ea ker in t h e ju n ct ion block a s r equ ir ed.
ONE WINDOW INOPERA TIVE
Th e win dow gla ss m u st be fr ee t o slide u p a n d
down for t h e power win dow m ot or t o fu n ct ion pr op-
er ly. If t h e gla ss is n ot fr ee t o m ove u p a n d down , t h e
m ot or will over loa d a n d t r ip t h e in t egr a l cir cu it
br ea ker. To det er m in e if t h e gla ss is fr ee, discon n ect
t h e r egu la t or pla t e fr om t h e gla ss. Th en slide t h e
win dow u p a n d down by h a n d.
Th er e is a n a lt er n a t e m et h od t o ch eck if t h e gla ss
is fr ee. P osit ion t h e gla ss bet ween t h e u p a n d down
st ops. Th en , sh a ke t h e gla ss in t h e door. Ch eck t h a t
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