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ELECTRICAL-BODY A N D CHASSIS 12-56
DEPRESSED PARK 2-SPEED WIPER AND WASHER
CORVETTE
GENERAL DESCRIPTION
The 2-speed windshield wiper (fig. 91) consists of a
compound wound 12 volt dc motor and a gear box section
containing the gear mechanism and relay control. The
motor armature is fitted with a worm gear which drives
the main gear assembly and crank arm.
The relay control, consisting of a relay coil, relay
armature and switch assembly, is located in the gear box"
section and controls the starting and stopping of the wiper
through a latching mechanism (fig. 92).
An electric .washer pump is mounted on the gear box
section of the wiper and is driven by the wiper unit gear
assembly (fig. 93).
SERVICE OPERATIONS
WIPER MOTOR AND WASHER
PUMP ASSEMBLY
REMOVAL AND INSTALLATION
1. Raise vehicle hood and disconnect, ground lead at
battery.
2. Remove engine distributor shielding and left bank
spark plug wire vertical shield.
3. Disconnect left bank spark plug wire bracket-to-
manifold and position assembly to one side.
4. Disconnect ignition resistor at firewall, then remove
washer pump inlet and outlet hose at pump valve
assembly.
5. Remove engine distributor cap and position to one
side; then disconnect washer pump and motor as-
sembly lead wires.
6. Remove glove box door and compartment. Refer to
Section 1 for removal procedure.
7. Make sure wiper arms and wiper motor are both in
the parked position; then remove the wiper trans-
mission retaining clip and disconnect both transmis-
sion and spacer from crank arm (fig. 93).
8. Remove four wiper motor-to-dash wall mounting
bolts and remove wiper motor from vehicle.
9. With the aid of an assistant position the wiper motor
to the dash wall and install the four motor mounting
bolts, making sure motor assembly is in parked
position.
GEAR
BOX
SECTION —<
MOUNTING
^ * ^
GROMMET
MOTOR
_ /
SECTION
MOUNTING
/"""GROMMET
ARMATURE END PLAY
ADJUSTING SCREW
AND LOCK NUT
P
^
CRANK
^ _
/GROMMETS
RELAY
F i g . 92 - Relay Control
10. Position left transmission assembly, spacer and
right transmission assembly on crank arm, then in-
stall the retaining clip in the groove in the crank
arm.
11. Install glove compartment and door assembly. Refer
to Section 1 for installation procedure.
12. Install washer pump and motor assembly lead wires;
then install engine-distributor cap.
13. Install washer pump inlet and outlet hose to pump
valve assembly, then install ignition resistor to
firewall.
14. Connect left bank spark plug wire bracket-to-mani-
fold, vertical shield and engine distributor shielding.
ROTOR C A M .
^
CAM SLOT-~-*"'
-
*
WASHER P U M P ^ .
DRIVE PIN
m
M
VALVE
— ASSEMBLY
i
Fig. 91 - Wiper Assembly—Corvette
Fig. 93 - Washer Pump
CHEVROLET CHASSIS SERVICE MANUAL
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