SERVICE MANUAL
TROUBLE SHOOTING
PROBLEM
PROBABLE CAUSE
SOLUTION
Stripped Gear Teeth
1.
Wiper blades striking windshield
1.
Adjust automatic parking.
molding during operation
2.
Binding connecting links.
2.
Correct.
3.
Excessive armature end play.
3.
Readjust.
4.
Operator stopping blades
4.
Caution operator.
manually when wiper is operating.
5.
Gear and shaft assembly
5.
Hold drive arm or drive plate
not properly supported when
in a vise or by hand when
drive plate securing nut is
tightening nut.
tightened.
Wiper Will Not Operate
1.
Binding condition in wiper
1.
Eliminate binding condition.
arm shaft assemblies,
connecting links, gear and
shaft assembly or armature.
2.
Field coil ground connection
2.
Clean coil lead and spot weld
broken.
it to housing or solder a
terminal to the lead, drill a
small hole in the housing and
rivet the terminal to the housing.
3.
Series coil open or grounded
3.
Replace motor housing
(insulated coil)
assembly.
4.
Brushes binding in holders
4.
Correct.
or not seated properly.
Insulated brush grounded.
5.
Faulty manual switch.
5.
Replace switch.
6.
Shorted, open, or grounded
6.
Replace armature.
armature.
7.
Rivets fastening drive dog
7.
Grind rivets down to a mini-
to drive gear striking contact
mum height of .023".
point spring, thus shorting
out the motor.
Wiper Will Not Shut Off
1.
Faulty parking switch assembly-
1.
Readjust points if possible or
replace switch assembly.
2.
Faulty cam.
2.
Replace cam.
3.
Faulty manual switch.
3.
Replace manual switch.
Wiper Continually Shutting Off
1.
Binding condition in wiper
1.
Eliminate binding condition.
arm shaft assemblies, con-
necting links, gear and
shaft assembly, or armature
2.
Electrical overload due to
2.
Repair or replace the faulty
faulty field coils or armature
part.
which causes the overload
protection switch to
continually make and break
the electrical circuit.
3.
Faulty overload switch.
3.
Replace switch.
4.
Faulty cable connections
4.
Correct.
5.
Brushes binding slightly in
5.
Correct.
holders or not seating
properly.
6.
Dirty or oily armature
6.
Clean commutator.
commutator.
CTS-4056-Chapter II
PRINTED IN UNITED STATES OF AMERICA
Page 6
