Ford COUGAR 1968 Shop Manual page 672

PART 15-4
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Windshield Wipers And Washers
15-57
NG. 4
-
Windshield
Wiper Trouble Diagnosis
Guide
(continued)
WIPERS WILL N O T STOP
OR WILL N O T STOP
IN
PARK POSITION
N O I S Y WlPER SYSTEM
ELECTRIC WINDSHIELD
WlPER TEST PROCEDURES
Verify the complaint.
3.
Defective park switch.
1. Open or broken wire.
4. Defective wiper switch.
2. Defective wiper motor.
Verify the complaint.
2. Improper wiper arms or blades.
I. Loose or misaligned wiper 3. Loose or worn linkage.
motor mounting.
MOTOR TEST
Test the motor on the vehicle.
Check that the motor ground makes
contact with the vehicle. If the motor
operates on both speeds i n these
checks, the switch or wiring is de-
fective. Test the switch and wiring
according to instructions given in
Wiper Switch Test. If the wipers oper-
ate at one speed but not at the other,
replace the motor. If the wipers will
not operate at either speed, check the
ground by running a jumper from the
ground strap to ground. If the wipers
still will not operate, test the linkage.
from the motor and move the linkage
(wipers) through their complete
strokes. If there is no bind in the
linkage, replace the motor. Check the
circuit breaker in the windshield wiper
switch before the new motor is in-
stalled. Refer to Wiper Switch Circuit
Breaker Test-High Current Pass Test.
WlPER SWITCH 'TEST
Check the continuity between ter-
minals of the switch as shown in Figs.
5, 6, 7 and 8. (As an alternate pro-
cedure plug a known good switch into
the wiring harness and operate). If
-
LINKAGE TEST
the switch is good, the wiring harness
is defective. Check the continuity of
Check for correct linkage on the
the wires and repair or replace the
vehicle, then disconnect the linkage defective wiring.
MONTECO (INTERMITTENT SYSTEM)
WlPER SWI'TCH CIRCUIT
BREAKER TEST
Connect the variable resistance unit
of a Rotunda Volt-Amp Tester as
shown in Figs. 9 and 10.
Set the
master control to maximum resistance
position initially to prevent damage to
the circuitry and ammeter.
Low Current Pass Test
Adjust the variable resistance until
the ammeter reads 6 amperes.
T t e ammeter should indicate 6
amperes for ten minutes. If the cir-
cuit will not indicate specified cur-
rent for ten minutes (current drops to
zero) the circuit breaker is defective.
Replace the switch.
MONTECO (STANDARD SYSTEM)
Using a sell-powered test lamp ar Rotundo ohmmeter, check the continuity through
the switch terminals. Continuity should e x i s t only as indicoted in the following
chart. Replace the switch
if
i t does not m e t the specified requirements.
SWITCH POSITION
Of1
(Park)
L o w
High
Intermittent
Washer On
CONTINUITY BETWEEN TERMINALS
63-763
58-589
5843-763
5643.763
63-763
56-993
58.590
950-95 1
COLOR CODE OF WIRING TO WlPER SWITCH
56
B l u e
763
Orange-White
58
White
950
White-Black
63
Red
951
Green-Black
589
Orange
993
B r m - W h i t e
590
Blue-White
U s i n g o sell-powered t e s t lomp or Rotundo.ohmmeter, check the continuity through
the switch terminols. Continuity should e x i s t only os indicoted in the following
chart. Replace the switch i f it does not meet the specified requirements.
SWITCH POSITION
Off (Park)
L a w
High
Washer O n
CONTINUITY BETWEEN TERMINALS
76343
28-58
763-6346
76343-56
951 -950
COLOR CODE OF WIRING TO WlPER SWITCH
28
Black
56
B l u e
58
White
63
Red
763
Orange-White
950
White-Block
951
Green-Block
NG. 5
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Wiper Switch Continuity Test Connections
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Montego