Voltmeter Between Terminal "L" And Ground; Test Lamp Between Terminal "H" And Ground - Dodge D150 1990 Service Manual

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WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 3
Fig. 1 Voltmeter Between Terminal "L" and Ground
CONDITION
M o t o r r u n s s l o w l y a t a l l speeds.
PROCEDURE
(1) Disconnect w i r i n g harness connector a t motor.
Remove wiper arms a n d blades. Connect a n ammeter
between battery a n d t e r m i n a l " L " on motor (Fig. 2).
(a) I f motor r u n s and average ammeter reading
is more t h a n 6 amps, proceed t o step 2.
(b) I f motor r u n s and average ammeter reading
is less t h a n 6 amps, proceed t o step 3.
(2) Check to see i f w i p e r linkage or pivots are bind-
i n g or caught. Disconnect drive l i n k from motor.
(a) I f motor n o w runs and draws less t h a n 3
amps, repair linkage system.
(b) I f motor continues to draw more t h a n 3
amps, replace motor assembly.
(3) Check motor w i r i n g harness for s h o r t i n g be-
tween h i g h and low speed wires as follows:
(a) Connect a voltmeter or test lamp t o motor
ground strap.
(b) Set wiper s w i t c h to L O W position.
(c) Connect other lead of voltmeter (test lamp)
to t e r m i n a l " H " of the w i r i n g harness.
(d) I f voltage is present, there is a short i n the
w i r i n g or wiper switch. I f no voltage is present pro-
ceed t o step (e).
(e) Set wiper switch to H I G H position.
(f) Move voltmeter (test lamp) lead f r o m t e r m i -
n a l " H " t o t e r m i n a l " L " o f the w i r i n g harness.
(g) I f voltage is present, there is a short i n t h e
w i r i n g or wiper switch.
CONDITION
M o t o r w i l l r u n a t h i g h s p e e d , b u t n o t a t l o w
s p e e d . M o t o r w i l l r u n a t l o w s p e e d , b u t n o t a t
h i g h s p e e d .
PROCEDURE
(1) I f motor w i l l not r u n on h i g h speed, p u t switch
i n H I G H position and connect a test l a m p between
motor t e r m i n a l " H " and ground (Fig. 3).
Fig. 3 Test Lamp Between Terminal "H" and
Ground
I f motor w i l l not r u n on low speed, p u t switch i n
L O W position and connect a test l a m p between motor
t e r m i n a l " L " and ground.
(2) I f test l a m p does not l i g h t a t motor t e r m i n a l ,
there is a n open i n w i r i n g or switch. I f test lamp
l i g h t s a t motor t e r m i n a l , replace motor assembly.
CONDITION
M o t o r w i l l k e e p r u n n i n g w i t h s w i t c h i n O F F
p o s i t i o n .
PROCEDURE
(1) Remove w i r i n g harness. Connect j u m p e r from
T e r m i n a l P2 to t e r m i n a l L of w i p e r motor (Fig. 4).
(2) Connect second j u m p e r from t e r m i n a l P I to bat-
tery. I f motor runs to P A R K position a n d stops,
wiper s w i t c h is faulty. I f motor keeps r u n n i n g and
does not p a r k , replace motor assembly.
CONDITION
M o t o r w i l l s t o p w h e r e v e r i t i s , w h e n c o l u m n
s w i t c h i s p u t i n O F F p o s i t i o n . ( W i p e r s d o n o t
c o n t i n u e r u n n i n g t o P A R K p o s i t i o n ) .