Dodge Sprinter 2006 Manual page 899

VA
Fig. 2 Grid Line Test
1 - VOLTMETER
2 - VOLTAGE FEED (A)
3 - FEED WIRE
4 - MID-POINT (C)
5 - HEATED WINDOW GRID
6 - GROUND WIRE
7 - GROUND (B)
REAR WI N DOW DEFOGGER
RELAY
DESCRIPTION
Th e left a n d r igh t r ea r win dow defogger (E BL)
r ela ys a r e In t er n a t ion a l St a n da r ds Or ga n iza t ion
(ISO)-t ype r ela ys (F ig. 3). Rela ys con for m in g t o t h e
ISO specifica t ion s h a ve com m on ph ysica l dim en sion s,
cu r r en t ca pa cit ies, t er m in a l fu n ct ion s a n d pa t t er n s.
Th e E BL r ela ys a r e elect r om ech a n ica l devices t h a t
swit ch ba t t er y cu r r en t t h r ou gh fu se 10 (30 a m p)
loca t ed in t h e fu se/r ela y block u n der t h e dr iver sea t
t o t h e r ea r win dow defogger
equ ipped, swit ch es ba t t er y cu r r en t t o t h e ou t side
m ir r or h ea t in g gr ids. Th e E BL r ela ys a r e en er gized
wh en t h e r ela y coils a r e pr ovided ba t t er y cu r r en t by
t h e r ea r win dow defogger m odu le.
Th e E BL r ela ys a r e loca t ed in t h e fu se/r ela y block
u n der t h e dr iver sea t . Refer t o t h e fu se a n d r ela y
m a p loca t ed on t h e in n er su r fa ce of t h e fu se/r ela y
block cover for t h e left a n d r igh t r ea r win dow defog-
ger (E BL) r ela y loca t ion s.
com pon en t of t h e t wo r ea r win dow defogger (E BL)
r ela ys. F ive m a le spa de-t ype t er m in a ls ext en d fr om
t h e bot t om of t h e ba se t o con n ect ea ch r ela y t o t h e
veh icle elect r ica l syst em , a n d t h e ISO design a t ion for
ea ch t er m in a l is m olded in t o t h e ba se a dja cen t t o
ea ch t er m in a l.
OPERA TION
r ela ys a r e elect r om ech a n ica l swit ch es t h a t u ses a low
cu r r en t in pu t fr om t h e r ea r win dow defogger m odu le
t o con t r ol t h e h igh cu r r en t ou t pu t t o t h e r ea r win dow
defogger gr ids. Th e m ova ble com m on feed con t a ct
gr ids a n d wh en
poin t is h eld a ga in st t h e fixed n or m a lly closed con -
t a ct poin t by spr in g pr essu r e. Wh en t h e r ela y coil is
en er gized, a n elect r om a gn et ic field is pr odu ced by t h e
coil win din gs. Th is elect r om a gn et ic field dr a ws t h e
m ova ble r ela y con t a ct poin t a wa y fr om t h e fixed n or-
m a lly closed con t a ct poin t , a n d h olds it a ga in st t h e
fixed n or m a lly open con t a ct poin t . Wh en t h e r ela y
coil is de-en er gized, spr in g pr essu r e r et u r n s t h e m ov-
a ble con t a ct poin t ba ck a ga in st t h e fixed n or m a lly
closed con t a ct poin t . Th e r esist or or diode is con -
n ect ed in pa r a llel wit h t h e r ela y coil in t h e r ela y, a n d
h elps t o dissipa t e volt a ge spikes a n d elect r om a gn et ic
in t er fer en ce t h a t ca n be gen er a t ed a s t h e elect r om a g-
n et ic field of t h e r ela y coil colla pses.
cle elect r ica l syst em t h r ou gh r ecept a cles in t h e fu se/
r ela y block. Th e in pu t s a n d ou t pu t s of t h e E BL
r ela ys in clu de:
t er y cu r r en t in pu t fr om fu se 10 (30 a m p) in t h e fu se/
r ela y block t h r ou gh a fu sed B(+) cir cu it a t a ll t im es.
Fig. 3 Rear Window Defogger (EBL) Relays
1 - REAR WINDOW DEFOGGER (EBL) RELAY (2)
2 - TERMINAL PATTERN
Th e bla ck, m olded pla st ic ca se is t h e m ost visible
Th e left a n d r igh t r ea r win dow defogger (E BL)
Th e E BL r ela y t er m in a ls a r e con n ect ed t o t h e veh i-
• Th e com m on feed t er m in a l (30) r eceives a ba t -
HEA TED GLASS 8G - 3