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<h2 align="center"><BR><B>Modified
Pulse Wiper System</B></h2>
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<TD align=middle width=448 bgColor=#ccffcc>Fig. 4 Modified pulse
windshield wiper motor</TD></TR>
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<p align="center"><IMG src="https://www.elcaminocentral.com/d2/articles/wipers/41923175.gif" </TD></TR></TBODY></TABLE>
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<BR><BR>Wiper
Inoperative<BR>
<OL type=1>
<LI>Connect a test lamp to wiper terminal No. 2, <B>Fig. 4,</B> and turn
ignition ``On.'' If test lamp does not light, check for blown wiper fuse. If
fuse is satisfactory, check for an open circuit between wiper terminal No. 2
and fuse block.
<LI>If fuse is blown in Step 1, disconnect wiring connector from wiper
terminals 1, 2, 3, replace fuse and turn ignition ``On.'' If fuse blows, check
for a grounded circuit between wiper terminal No. 2 and fuse block.
<LI>If fuse does not blow in Step 2, reconnect wiring connector to wiper
terminals and, with ignition ``On,'' place dash switch in ``Lo'' position. If
fuse blows, motor is defective.
<LI>If test lamp lights in Step 1, connect a test lamp between black wire with
pink stripe and the ground. Place dash switch in ``Lo'' position and turn
ignition ``On.'' If test lamp lights, motor is defective.
<LI>If test lamp remains off in Step 4, connect a jumper wire between wiper
terminal No. 1 and ground. Place dash switch in ``Lo'' and turn ignition
``On.'' If wiper operates, check for open circuit between wiper terminal No. 1
and dash switch, an improperly grounded dash switch or a defective dash
switch.
<LI>If wiper remains inoperative in Step 5, motor is defective.</LI></OL>
<P>Wiper Inoperative In Delay<BR></P>
<OL type=1>
<LI>Disconnect wiring connector from wiper terminals Nos. 6 and 7, then
connect a voltmeter between connector terminal No. 7 and ground, <B>Fig.
4.</B> Place dash switch in ``Mid'' delay and turn ignition ``On.'' If
voltmeter indicates 12 volts, motor is defective.
<LI>If voltmeter reading in Step 1 is zero volts, check B+ circuit to dash
switch, wiring between dash switch and wiper and to ensure dash switch is
satisfactory.</LI></OL>
<P>Wiper Will Not Pulse (Runs Continuously in Delay Mode)<BR></P>
<OL type=1>
<LI>Disconnect wiring connector from wiper terminals Nos. 6 and 7, remove lead
from connector that connects to wiper terminal No. 6, <B>Fig. 4,</B> then
reinstall connector. Place dash switch in ``Mid'' delay and turn ignition
``On.'' If wiper operates properly, check for: grounded circuit between wiper
terminal No. 6 and dash switch or a defective dash switch.
<LI>If wiper runs continuously in Step 1, motor is defective.</LI></OL>
<P>

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<TD align=middle width=234 bgColor=#ccffcc>Fig. 17 Ratchet wheel &
override switch assembly</TD></TR>
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<p align="center"><IMG src="https://www.elcaminocentral.com/d2/articles/wipers/41923188.gif"
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<BR><BR>Wiper
Will Not Shut Off<BR>
<OL type=1>
<LI>Disconnect wiring connector from wiper terminals Nos. 1, 2, 3, then remove
lead that connects to wiper terminal No. 1, then reinstall connector. Place
dash switch in ``Off,'' and turn ignition ``On.'' If wiper shuts ``Off,''
check for a grounded circuit between wiper terminal No. 1 and dash switch.
<LI>If wiper continues to run in Step 1, remove washer
pump cover and reconnect all disconnected wiring. Disconnect green lead
from wiper terminal 1, place dash switch in ``Off'' and turn ignition ``On.''
If wiper continues to run, motor is defective.
<LI>If wiper shuts ``Off'' in Step 2, check if ratchet gear is opening
override switch contacts, <B>Fig. 17.</B> If gear is correctly positioned and
the switch contacts are open, check the disconnected green leads for grounds.
<LI>If ratchet gear is properly positioned and the switch contacts are closed,
torque mounting screw to 14 inch lbs., and adjust contact gap to .025
inch.</LI></OL>
<P>

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<TD align=middle width=352 bgColor=#ccffcc>Fig. 18 Washer relay armature
leg position 1</TD></TR>
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<TD align=middle width=234 bgColor=#ccffcc>Fig. 19 Washer relay armature
leg position 2</TD></TR>
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<TD><IMG src="https://www.elcaminocentral.com/d2/articles/wipers/41923190.gif"></TD></TR></TBODY></TABLE>
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<BR><BR>Wiper
Will Not Shut Off & Washer Runs Continuously<BR>
<OL type=1>
<LI>Remove washer
pump cover and reconnect wiring. Place dash switch ``Off'' and turn
ignition ``On.'' Check position of washer relay armature leg with unit
operating. If relay armature is in No. 1 position, <B>Fig. 18,</B> check that
Binding park switch actuator or defective park switch ratchet gear dog spring
engages gear teeth. Tighten mounting screw or replace as required.
<LI>If relay armature leg is in No. 2 position, <B>Fig. 19,</B> push button
and check if relay armature leg drops on armature leg ramp and pump completes
wash cycle and wiper shuts ``Off'' in position 1. If relay armature leg drops
back into slot, motor is defective.
<LI>If relay armature leg drops on ramp, pump completes cycle and wiper shuts
``Off'' in Step 2, check for loose coil on pole piece or a missing relay
armature. If a burr is present on end of armature leg, file off burr and
recheck unit.</LI></OL>
<P>Wiper Will Not Shut Off--Blades Move In & Out of Park<BR></P>
<OL type=1>
<LI>With ignition ``On,'' check wiper operation in ``Lo'' and ``Hi'' speeds.
If wiper operates in both speeds, motor is defective <B>Wiper will not delay
if operates only in ``Hi'' speed.</B>
<LI>If wiper operates in ``Hi'' speed only in Step 1, connect a jumper wire
between wiper terminal No. 3 and the ground. Place dash switch in ``Lo'' and
turn ignition ``On.'' If wiper still has ``Hi'' speed only, motor is
defective.
<LI>If wiper has ``Lo'' speed in Step 2, check for an open circuit between
wiper terminal No. 3 and dash switch or a defective dash switch.</LI></OL>
<P>Wiper Has Hi Speed Only<BR></P>
<OL type=1>
<LI>Connect a jumper wire between wiper terminal No. 3 and the ground. Place
dash switch in ``Lo'' and turn ignition ``On.'' If wiper still has ``Hi''
speed only, motor is defective.
<LI>If wiper has ``Lo'' speed in Step 1, check for open circuit between wiper
terminal No. 3 and dash switch or a defective dash switch.</LI></OL>
<P>Wiper Has Lo Speed Only<BR></P>
<OL type=1>
<LI>Disconnect wiring connector from terminals 1, 2, and 3 and remove lead
that connects to wiper terminal No. 3, then re-install connector. Place dash
switch in ``Hi'' and turn ignition ``On.'' If wiper still has ``Lo'' speed
only, motor is defective.
<LI>If wiper has ``Hi'' speed in Step 1, check for grounded circuit between
wiper terminal No. 3 and dash switch or a defective dash switch.</LI></OL>
<P>Wiper Operates Intermittently<BR></P>
<OL type=1>
<LI>Remove wiper system fuse from fuse block and connect an ammeter across
fuse block terminals. Place dash switch in ``Lo'' and turn ignition ``On.''
Operate motor and after two minutes of operation, observe ammeter for lowest
current reading. If lowest current reading was 5---6.5 amps, motor is
defective.
<LI>If lowest current reading exceeds 6.5 amps, replace wiper
blade elements and repeat Step 1. If current draw is less than 6.5 amps,
condition is corrected.
<LI>If lowest current reading in Step 2 still exceeds 6.5 amps, disconnect
wiper linkage from crank arm and repeat check. If current draw is below 6.5
amps, check for binding wiper linkage. If current draw still exceeds 6.5 amps,
motor is defective.</LI></OL>
 

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Modified Pulse Wiper System

Fig. 4 Modified pulse windshield wiper motor


Wiper Inoperative
Connect a test lamp to wiper terminal No. 2,
Fig. 4, and turn ignition ``On.''
If test lamp does not light, check for blown wiper fuse. If fuse is satisfactory,
check for an open circuit between wiper terminal No. 2 and fuse block.
If fuse is blown in Step 1, disconnect wiring connector from wiper
terminals 1, 2, 3, replace fuse and turn ignition ``On.''
If fuse blows, check for a grounded circuit between wiper terminal No. 2 and fuse block.
If fuse does not blow in Step 2, reconnect wiring connector to wiper
terminals and, with ignition On,'' place dash switch in Lo'' position.
If fuse blows, motor is defective.
If test lamp lights in Step 1, connect a test lamp between black wire with
pink stripe and the ground. Place dash switch in ``Lo'' position and turn
ignition ``On.'' If test lamp lights, motor is defective.

If test lamp remains off in Step 4, connect a jumper wire between wiper
terminal No. 1 and ground. Place dash switch in ``Lo'' and turn ignition
``On.'' If wiper operates, check for open circuit between wiper terminal No. 1
and dash switch, an improperly grounded dash switch or a defective dash switch.
If wiper remains inoperative in Step 5, motor is defective.


Wiper Inoperative In Delay
Disconnect wiring connector from wiper terminals Nos. 6 and 7, then
connect a voltmeter between connector terminal No. 7 and ground, Fig. 4.
Place dash switch in Mid'' delay and turn ignition On.''
If voltmeter indicates 12 volts, motor is defective.
If voltmeter reading in Step 1 is zero volts, check B+ circuit to dash
switch, wiring between dash switch and wiper and to ensure dash switch is
satisfactory.


Wiper Will Not Pulse (Runs Continuously in Delay Mode)
Disconnect wiring connector from wiper terminals Nos. 6 and 7, remove lead
from connector that connects to wiper terminal No. 6, Fig. 4, then
reinstall connector. Place dash switch in ``Mid'' delay and turn ignition
``On.'' If wiper operates properly, check for: grounded circuit between wiper
terminal No. 6 and dash switch or a defective dash switch.
If wiper runs continuously in Step 1, motor is defective.

Fig. 17 Ratchet wheel & override switch assembly



Wiper Will Not Shut Off
Disconnect wiring connector from wiper terminals Nos. 1, 2, 3, then remove
lead that connects to wiper terminal No. 1, then reinstall connector. Place
dash switch in Off,'' and turn ignition On.'' If wiper shuts Off,''
check for a grounded circuit between wiper terminal No. 1 and dash switch.
If wiper continues to run in Step 1, remove washer
pump cover and reconnect all disconnected wiring. Disconnect green lead
from wiper terminal 1, place dash switch in Off'' and turn ignition On.''
If wiper continues to run, motor is defective.
If wiper shuts ``Off'' in Step 2, check if ratchet gear is opening
override switch contacts, Fig. 17. If gear is correctly positioned and
the switch contacts are open, check the disconnected green leads for grounds.
If ratchet gear is properly positioned and the switch contacts are closed,
torque mounting screw to 14 inch lbs., and adjust contact gap to .025 inch.


Fig. 18 Washer relay armature leg position 1



Fig. 19 Washer relay armature leg position 2



Wiper Will Not Shut Off & Washer Runs Continuously
Remove washer
pump cover and reconnect wiring. Place dash switch ``Off'' and turn
ignition ``On.'' Check position of washer relay armature leg with unit
operating. If relay armature is in No. 1 position, Fig. 18, check that
Binding park switch actuator or defective park switch ratchet gear dog spring
engages gear teeth. Tighten mounting screw or replace as required.
If relay armature leg is in No. 2 position, Fig. 19, push button
and check if relay armature leg drops on armature leg ramp and pump completes
wash cycle and wiper shuts ``Off'' in position 1. If relay armature leg drops
back into slot, motor is defective.
If relay armature leg drops on ramp, pump completes cycle and wiper shuts
``Off'' in Step 2, check for loose coil on pole piece or a missing relay
armature. If a burr is present on end of armature leg, file off burr and
recheck unit.


Wiper Will Not Shut Off--Blades Move In & Out of Park
With ignition On,'' check wiper operation in Lo and Hi'' speeds.
If wiper operates in both speeds, motor is defective Wiper will not delay
if operates only in ``Hi'' speed.
If wiper operates in ``Hi'' speed only in Step 1, connect a jumper wire
between wiper terminal No. 3 and the ground. Place dash switch in ``Lo'' and
turn ignition On.'' If wiper still has Hi'' speed only, motor is defective.
If wiper has ``Lo'' speed in Step 2, check for an open circuit between
wiper terminal No. 3 and dash switch or a defective dash switch.


Wiper Has Hi Speed Only
Connect a jumper wire between wiper terminal No. 3 and the ground. Place
dash switch in Lo'' and turn ignition On.'' If wiper still has Hi''
speed only, motor is defective.
If wiper has ``Lo'' speed in Step 1, check for open circuit between wiper
terminal No. 3 and dash switch or a defective dash switch.

Wiper Has Lo Speed Only
Disconnect wiring connector from terminals 1, 2, and 3 and remove lead
that connects to wiper terminal No. 3, then re-install connector. Place dash
switch in Hi'' and turn ignition On.'' If wiper still has Lo'' speed
only, motor is defective.
If wiper has ``Hi'' speed in Step 1, check for grounded circuit between
wiper terminal No. 3 and dash switch or a defective dash switch.

Wiper Operates Intermittently
Remove wiper system fuse from fuse block and connect an ammeter across
fuse block terminals. Place dash switch in Lo'' and turn ignition On.''
Operate motor and after two minutes of operation, observe ammeter for lowest
current reading. If lowest current reading was 5---6.5 amps, motor is
defective.
If lowest current reading exceeds 6.5 amps, replace wiper
blade elements and repeat Step 1. If current draw is less than 6.5 amps,
condition is corrected.
If lowest current reading in Step 2 still exceeds 6.5 amps, disconnect
wiper linkage from crank arm and repeat check. If current draw is below 6.5
amps, check for binding wiper linkage. If current draw still exceeds 6.5 amps,
motor is defective.
 
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