Dodge Sprinter 2006 Manual page 2050

24 - 18 CONTROLS-FRONT
Th e blower m ot or r esist or is a ccessed for ser vice
wit h ou t r em ovin g a n y ot h er com pon en t s.
Fig. 15 Front Blower Motor Resistor
1 - MOUNTING PLATE
2 - WIRE CONNECTOR RECEPTACLE
3 - CERAMIC HEAT SINK
OPERA TION
Th e blower m ot or r esist or block h a s m u lt iple r esis-
t or wir es. E a ch r esist or wir e ch a n ges t h e r esist a n ce
in t h e blower m ot or cu r r en t pa t h t o ch a n ge t h e
blower m ot or speed. Th e blower m ot or swit ch dir ect s
t h e cu r r en t t h r ou gh t h e cor r ect r esist or wir e t o
obt a in t h e select ed speed.
Wit h t h e blower m ot or swit ch in t h e lowest speed
posit ion , volt a ge for t h e m ot or is a pplied t h r ou gh a ll
of t h e r esist or wir es. E a ch h igh er speed select ed wit h
t h e blower m ot or swit ch a pplies t h e blower m ot or
cu r r en t pa t h t h r ou gh fewer of t h e r esist or wir es,
in cr ea sin g t h e blower m ot or speed. Wh en t h e blower
m ot or swit ch is in t h e h igh est speed posit ion , t h e
blower m ot or r esist or is bypa ssed a n d t h e blower
m ot or cir cu it r eceives a dir ect pa t h t o ba t t er y volt -
a ge.
Th e blower m ot or r esist or block ca n n ot be r epa ir ed
a n d, if fa u lt y or da m a ged, it m u st be r epla ced.
DI AGN OSI S AN D T EST I N G
BLOWER MOTOR RESISTOR
NOTE: For circuit descriptions and diagrams, refer
to the appropriate wiring information. The wiring
information includes wiring diagrams, proper wire
and connector repair procedures, further details on
wire harness routing and retention, as well as pin-
out and location views for the various wire harness
connectors, splices and grounds.
(1) Discon n ect a n d isola t e t h e n ega t ive ba t t er y
ca ble.
(2) Discon n ect t h e wir e h a r n ess con n ect or fr om t h e
blower m ot or r esist or.
(3) Ch eck for con t in u it y bet ween ea ch of t h e
blower m ot or swit ch in pu t t er m in a ls of t h e r esist or
a n d t h e r esist or ou t pu t t er m in a l. In ea ch ca se t h er e
sh ou ld be con t in u it y. If OK, r epa ir t h e wir e h a r n ess
cir cu it s bet ween t h e blower m ot or swit ch a n d t h e
blower m ot or r esist or or blower m ot or a s r equ ir ed. If
n ot OK, r epla ce t h e fa u lt y blower m ot or r esist or.
REMOVAL
(1) Discon n ect a n d isola t e t h e n ega t ive ba t t er y
ca ble.
(2) Depr ess t h e lockin g t a b a n d r em ove t h e blower
m ot or r esist or fr om t h e ven t ila t ion h ou sin g by slidin g
t h e r esist or in boa r d (F ig. 16).
(3) Depr ess t h e t wo lockin g t a bs a n d discon n ect
t h e wir e h a r n ess con n ect or fr om t h e blower m ot or
r esist or.
(4) Rem ove t h e blower m ot or r esist or fr om t h e
en gin e com pa r t m en t .
Fig. 16 Blower Motor Resistor Block
1 - BLOWER MOTOR RESISTOR
2 - ELECTRICAL CONNECTOR
3 - VENTILATION HOUSING
INSTALLA TION
(1) Con n ect t h e wir e h a r n ess con n ect or t o t h e
blower m ot or r esist or a n d en ga ge t h e t wo lockin g
t a bs.
(2) In st a ll t h e blower m ot or r esist or in t o t h e ven -
t ila t ion h ou sin g a n d en ga ge t h e lockin g t a b. Th e
h ou sin g is in dexed t o a llow m ou n t in g in on ly on e
posit ion .
(3) Recon n ect t h e n ega t ive ba t t er y ca ble.
VA