Dodge Sprinter 2006 Manual page 898

8G - 2 HEA TED GLASS
r ela ys wh ich a llows ba t t er y cu r r en t t o flow t o t h e
r ea r win dow defogger gr id lin es. Th e h ea t ed gr id
lin es h ea t t h e r ea r gla ss t o h elp clea r t h e r ea r win -
dow su r fa ces of fog or fr ost .
Th e elect r ic ba ckligh t (E BL) syst em is con t r olled
by t h e E BL t im in g cir cu it y, wh ich is in t egr a l t o t h e
r ea r win dow defogger m odu le. A yellow in dica t or in
t h e swit ch will illu m in a t e t o in dica t e wh en t h e E BL
syst em is t u r n ed on .
NOTE: The EBL system turns off automatically after
approximately 10 minutes of initial operation. Each
following activation cycle of the EBL system will
last approximately five minutes.
Th e E BL syst em will be a u t om a t ica lly t u r n ed off
a ft er a pr ogr a m m ed t im e in t er va l of a bou t t en m in -
u t es. Aft er t h e in it ia l t im e in t er va l h a s expir ed, if t h e
r ea r win dow defogger swit ch is pr essed t o t h e On
posit ion a ga in du r in g t h e sa m e ign it ion cycle, t h e
E BL syst em will a u t om a t ica lly t u r n off a ft er a bou t
five m in u t es.
Th e E BL syst em will a u t om a t ica lly sh u t off if t h e
ign it ion swit ch is t u r n ed t o t h e Off posit ion , or it ca n
be t u r n ed off m a n u a lly by pr essin g t h e defogger
swit ch a secon d t im e.
DI AGN OSI S AN D T EST I N G
ELECTRIC BACKLIGHT (EBL) SYSTEM
NOTE: Illumination of the defogger switch indicator
lamp means that there is electrical current available
at the output of the rear window defogger logic cir-
cuitry, but does not confirm that the electrical cur-
rent is reaching the rear glass heating grid lines.
NOTE: For circuit descriptions and diagrams of the
EBL system, refer to 8W - WIRING DIAGRAM
INFORMATION.
Oper a t ion of t h e elect r ica l ba ckligh t (E BL) syst em
ca n be con fir m ed by t h e followin g:
(1) Tu r n t h e ign it ion swit ch t o t h e On posit ion . Set
t h e r ea r win dow defogger swit ch in t h e On posit ion .
Th e r ea r win dow defogger oper a t ion ca n be ch ecked
by feelin g t h e r ea r win dow gla ss. A dist in ct differ en ce
in t em per a t u r e bet ween t h e gr id lin es a n d t h e a dja -
cen t clea r gla ss sh ou ld be det ect ed wit h in t h r ee t o
fou r m in u t es of oper a t ion .
(2) If a t em per a t u r e differ en ce is n ot det ect ed, u se
a 12-volt DC volt m et er a n d con t a ct t h e r ea r gla ss
h ea t in g gr id t er m in a l B wit h t h e n ega t ive lea d, a n d
t er m in a l A wit h t h e posit ive lea d (F ig. 2). Th e volt -
m et er sh ou ld r ea d ba t t er y volt a ge. If t h e volt m et er
does n ot r ea d ba t t er y volt a ge, ch eck t h e followin g:
• Con fir m t h a t t h e ign it ion swit ch is in t h e On
posit ion .
• Ma ke su r e t h a t t h e r ea r gla ss h ea t in g gr id feed
wir es a n d gr ou n d wir es a r e con n ect ed t o t h e win dow
t er m in a ls. Con fir m t h a t t h e gr ou n d wir es h a ve con t i-
n u it y t o gr ou n d.
• Ch eck t h a t fu se 7 (15 a m p) in fu se block #1 a n d
fu se 10 (30 a m p) in t h e fu se/r ela y block a r e OK. Th e
fu ses m u st be t igh t in t h er e r ecept a cles a n d a ll elec-
t r ica l con n ect ion s m u st be secu r e.
(3) Wh en t h e a bove st eps h a ve been com plet ed a n d
t h e r ea r gla ss h ea t in g gr id is st ill in oper a t ive, on e or
m or e of t h e followin g is fa u lt y.
• Rea r win dow defogger swit ch in t h e in st r u m en t
pa n el.
• Rea r win dow defogger (E BL) r ela ys in t h e fu se/
r ela y block.
• Rea r win dow defogger (E BL) r ela y con t r ol cir cu -
it y in t h e r ea r win dow defogger m odu le.
• Ch eck for a loose wir e con n ect or or a wir e
pu sh ed ou t of a con n ect or.
• Rea r win dow gr id lin es (a ll gr id lin es wou ld
h a ve t o be br oken , or t h e power feed or gr ou n d wir e
n ot con n ect ed, for t h e en t ir e h ea t in g gr id t o be in op-
er a t ive).
(4) If t h e syst em oper a t ion h a s been ver ified bu t
t h e defogger swit ch in dica t or does n ot illu m in a t e,
ch eck for volt a ge a t t h e defogger in dica t or fr om t h e
r ea r win dow defogger m odu le wh en t h e defogger
swit ch is a ct iva t ed. If power is pr esen t , r epla ce t h e
r ea r win dow defogger swit ch .
(5) If br oken defogger gr id lin es a r e su spect ed, u se
a 12-volt DC volt m et er a n d con t a ct t er m in a l B wit h
t h e n ega t ive lea d a n d ea ch r ea r gla ss h ea t in g gr id
lin e a t it 's m id-poin t wit h t h e posit ive lea d. Th e volt -
m et er sh ou ld r ea d a ppr oxim a t ely 6 volt s a t ea ch gr id
lin e m id-poin t C. If t h e volt m et er does n ot r ea d
a ppr oxim a t ely 6 volt s, r epa ir t h e open gr id lin e(s)
(Refer t o 8 - E LE CTRICAL/H E ATE D GLASS/RE AR
WINDOW DE F OGGE R GRID - STANDARD P ROCE -
DURE ).
VA