1967 CHEVROLET CAMARO electrical

ELECTRICAL-BODY AND CHASSIS 12-54

INNER

SPACER

WASHER

LOCK

PAWL

COIL

SPRING

DRIVE,

PAWL

DRIVE
SHAFT

AND
PLATE

ASSEMBLY
DRIVE
AND
LOCK
PAWL
GUIDE

PINS
IN
GEAR
POCKETS
7

DURING
NORMAL
OPERATION

RELAY
LATCH
ARM
IS
HELD

OUT OF
PATH
OF
GEAR
BY

RELAY
MAGNET

11.

12.
Fig. 87 - Drive Gear and Shaft Assembly

CAUTION: It may be necessary at this point to

rotate armature slightly before the armature

worm will engage with worm gear teeth.

Rotate the case as required to align the bolt holes in

the case with those in the housing.

Secure the case to the housing with the two tie bolts.

GEAR BOX SECTION
Fig. 88 - Drive and Lock Pawl Guide Pins in Pockets

(drive pawl away from latch arm, fig. 81), proceed

to Step 3.

Remove relay-switch attaching screw (fig. 80) and

carefully lift the relay-switch assembly out of the

gear box. Unsolder leads from switch terminals as

required. Refer to Figure when resoldering leads.

To remove terminal board assembly simply slide it

out of housing and unsolder leads as required.

The gear box section is subdivided into two areas, (A)

the relay control and latching mechanism and (B) the

drive gear mechanism.

A—Relay Switch and Latch Assembly-

Terminal Board Removal

1.
Remove screws retaining washer pump assembly to

wiper unit.

2.
If wiper pawl is in full park position (drive pawl lo-

cated in magnetic switch assembly slot, fig. 79), it

becomes necessary to remove gear assembly first

(see Gear Assembly Removal).

If wiper gear mechanism is not in park position
VALVE

ASSEMBLY—j

RATCHET ->Mmk
LATC

SPR
HOUT

ING
RELAY COIL

/PAWL SPRING

/ /'

^L / PAWL

|j^»i It

RATCHET

WHEEL

Fig. 89 - Washer Pump Assembly

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-55

COVER RELAY COIL

ASSEMBLY
PAWL SPRING

a=-

VALVE ASSEMBLY

RATCHET DOG AND _/_ f1

LATCHOUT SPRING ^—-»*
PAWL

RATCHET WHEEL

J

Fig.
SO
-
Exploded View
of
Pump

Relay Switch—Latch and Terminal Board Assembly

1.
Resolder leads
to
wiper terminal board as required

(fig. 82).

2.
Slide terminal board into wiper housing being careful

to position the terminal board resistor lead as shown

in Figure 83.

3.
Resolder leads
to
relay switch assembly
as
required

(fig. 82).

4.
Position relay-switch assembly
in
housing.

CAUTION:
Be
very careful
to
route leads
in

such
a
manner
as to
avoid having them pinched

between relay and wiper housing.

5. Install relay-switch mounting screw.

6. Assemble gear box cover and washer pump assembly

to wiper being careful that the ground strap
is
prop-

erly connected. Refer
to
Figure 75 for assembly
of

washer pump
to
gear housing.

B-Drive Gear Disassembly (Fig.
84)

1.
Remove washer pump assembly.

2.
Remove crank
arm
retaining nut, crank arm, rubber

seal
cap,
retaining ring, shim washers, shield
and

spacer washer in the order indicated.

3.
Slide gear assembly out
of
housing (fig. 85).

4.
Slide drive plate and shaft out
of
gear and remove the

drive pawl, lock pawl
and
coil spring
as
required.

Drive Gear—Assembly

1.
Position drive pawl
on
drive plate
as
shown
in
Fig.

ure 86.

2.
Assemble lock pawl over drive pawl
as
shown
in

Figure
86.

3.
Slide gear
and
tube over
the
drive shaft (fig. 87).

(Move drive and lock pawls
as
required to allow their

respective pins
to fit in the
gear guide channel,

fig.
88).

4.
Holding
the
gear, manually rotate
the
drive plate

until
the
drive
and
lock pawl guide pins snap into

their respective pockets in the gear (fig. 88).
5. Reinstall coil spring between lock
and
drive pawls

(fig. 88).

IMPORTANT: Be very careful
to
maintain lock

and drive pawl guide pins
in
their respective

pockets during Step
6.

6. Assemble inner spacer washer over gear shaft
and

assemble gear mechanism
in
housing
so
that
it is

positioned with respect to the housing in the approxi-

mate location shown
in
Figure 85.

7. Reassemble
the
outer spacer washer, shield, shim

washers
as
required
to
obtain .005"
max.
end play,

snap ring and rubber seal cap in the order indicated.

Refer to Figure 84.

8. Operate wiper
to
"park"
or
"off" position and install

crank arm.

9. Reassemble washer pump
to
wiper (fig. 75).

WASHER PUMP UNIT

The washer pump and/or valve assembly
may be re-

moved from the wiper assembly
as a
unit; therefore,
it is

not necessary
to
remove
the
wiper assembly irom
the

vehicle
if
only
the
washer pump and/or valve assembly

required service.

When
the
pump
is
removed from
the
wiper assembly,

all working parts
are
readily accessible and may easily

be serviced
as
necessary
(fig. 89).
An exploded view
of

the washer pump
is
shown in Figure 90.

Removal and Installation

1.
Raise vehicle hood.

2.
Disconnect washer hoses
and
electrical connections

from assembly.

3.
Remove
3
screws securing washer pump
and
cover

to wiper assembly. Remove pump from wiper gear

box.

4.
Position pump
and
cover assembly
to
the wiper and

install retaining screws.

5. Connect washer hoses
to
valve assembly and wiring

leads
to
pump and wiper terminals.

6. Check operation
of
unit.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
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

Fig.
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
CAM. ^

CAM SLOT-~-*"'-*

WASHER PUMP^.

DRIVE
PIN
m

M
VALVE

— ASSEMBLY

i

Fig.
91 - Wiper Assembly—Corvette
Fig.
93 - Washer Pump

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-57

15.
Connect positive lead to battery terminal, lower hood

and test wiper and washer assembly for proper

operation.

WIPER TRANSMISSION

REMOVAL AND INSTALLATION

1.
Remove wiper block and arm assembly from trans-

mission.

2.
Remove glove box door and compartment assembly.

Refer to Section 1 for removal procedures.

3.
Remove three transmission-td-cowl retaining

screws.

4.
Remove wiper transmission retaining clip and re-

move transmission from crank arm. Then remove

transmission through the glove box opening.

5.
Reverse removal procedure to install wiper trans-

mission.

Fig.
94 - Wiper and Trans Installed

WIPER ASSEMBLY REPAIRS

The overhaul procedures for the wiper are broken down

into three major areas: The motor section, gear box

section and washer pump section. Each section may be

serviced independently of the other.

MOTOR SECTION

Disassembly

1.
Remove the two motor tie bolts.

2.
Remove the armature end-play adjusting screw (fig.

91).

3.
Strike the steel case lightly with a mallet to partiaUy

loosen it from the die casting housing and motor

field.

4.
Insert a tool through the armature adjusting screw

opening and push against the end of the armature

shaft to back off the case. This will retain the ar-

mature commutator in position between the brushes

until ready to separate the armature from the case.

5.
To separate armature from case while still retaining

the brush springs and brushes in place fashion a

spring similar to that shown in Figure 95 and insert

behind the brush leads as shown.
Fig.
95 - Retaining Armature Brushes

6. Pull the armature out of the case and remove the felt

washer, thrust plate, and rubber thrust disc from the

case assembly bearing as required.

7.
The field windings are pressed into the gear housing

and further disassembly is not recommended; how-

ever, the field leads may be unsoldered from the

brush holders to remove the case.

8. Clean and inspect all parts.

Inspect both the field and armature for damage

due to overheating such as unsoldered electrical

connections.

Check that brush leads are firmly attached both

to the brushes and their connections at the brush

holders.

Check brushes for wear. If brushes are worn to

within 3/16" of brush lead, or pigtail, they should be

replaced.

Check contacts of circuit breaker shown at top of

Figure 95. Clean as required or file lightly to re-

move irregularities.

Inspect all leads from the brush and circuit

breaker plate for worn insulation or tjreaks.

If it was determined by inspection that brush re-

placement was required, proceed as follows:

a. Remove retainer installed during disassembly and

remove brush springs.

b.
Place a hot soldering iron against*brush lead con-

nection on brush holders, remove old bushes, and

nection on brush holders, remove old brushes,

and install new brushes.

c. To reinstall brushes in holders, compress spring

within holder and hold fully compressed with a

thin instrument inserted through the slot in the

brush holder. Then push brush into holder with

lead upward to project through slot in holder, hold

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-58

RETAINER NUT

.SEAL CAP
THROUGH
BOLT,

CASE

CRANK

ARM

THRUST
BALL

FELT
WASHER

STEEL THRUST PLATE

RUBBER THRUST PLATE

SPACER WASHER

HOUSING

ARMATURE END PLAY

ADJUSTING SCREW
PAWL SPRING'

DRIVE
PAWL'

DRIVE PLATE

WASHER

ASSEMBLY

Fig.
96 - Wiper Assembly Exploded View

brush tightly, and remove instrument retaining

spring. Hold brush installed with improvised

separator as shown in Figure 95.

STOP

RETAINING

SCREW

LATCH AND

FOLLOWER
Reassembly

1.
Assemble rubber thrust disc, steel thrust plate and

felt washer in order indicated (fig. 96).

2.
Be sure steel thrust ball is located in commutator

end of armature shaft, lubricate armature shafts and

thrust ball with a high melting point grease and in-

stall armature shaft in case assembly bearing.

3.
Remove the brush retainer spring.

4.
Maintaining the armature in its assembled position in

the case, start the armature worm shaft through the

field and housing bearing until it starts to mesh with

the worm gear.

GREEN

YELLOW

STOP
TAB

RELAY

ARMATURE

Fig.
97 - Relay Disassembly

Fig. 98 - Relay Wiring

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-59

NOTE: it may be necessary at this point to

rotate the armature slightly before the worm

will engage with the worm gear.

5.
Rotate the case as required to align the holes in the

case with those in the housing.

6. Being very careful not to pinch any of the motor

leads between the case and edge of the field, push the

case onto the field until it butts against the housing.

7.
Secure case to housing with two tie bolts.

8. Install end-play adjusting screws and locknut and

adjust end-play by tightening adjusting screw finger

tight; then back off screw 1/4 turn and tighten

locknut.

GEAR BOX SECTION

The gear box section is subdivided into two areas, (A)

the relay control and latching mechanism and (B) the

drive gear mechanism.

A—Relay Control and Latching Mechanism:

Disassembly

1.
Remove four screws which secure the washer pump

assembly to gear box.

2.
Refer to Figure 97. Disconnect coil spring, remove

"E"
ring and lift the latch and follower assembly off

the pivot pin and relay armature.

3.
Remove the stop assembly retaining screw. This

will permit the stop assembly to be moved as neces-

sary to allow clearance for removing the relay con-

trol assembly.
Fig.
100 - Assembly Gear and Eccentric Shaft

4.
Remove the two screws that secure the relay control

assembly.

5.
Lift the relay control assembly out of the gearbox

and unsolder leads as required.

Reassembly

1.
Solder existing green and yellow wiper leads to relay

control switch and solder the relay coil Iea4 to the

wiper unit terminal board as shown in Figure

B—Drive Gear Mechanism:

Disassembly

Refer to Figure 84 unless other wise specified.

1.
Remove the crank arm retaining nut (No. 1).

2.
Remove crank arm (No. 2), snap ring (No. 3) and

rubber seal (No. 4).

3.
Remove the retaining ring (No. 5), end play washers

(No.
6), shield (No. 7) and spacer washer (No. 8).

4.
Follow Steps 1 through 3 under relay control and

latch mechanism disassembly.

Fig.
99 - Lock and Drive Pawi Mechanism
Fig.
101 - Drive Gear Mechanism Installed

CHEVROLET CHASSIS SER\

ELECTRICAL-BODY AND CHASSIS 12-60

....
£
VALVE ASSEMBLY

mm

BROWN
*yr

RED '
WATER

INTAKE

PORT

|f|i

Wjjm WATER

|HP DISCHARGE

W PORTS

WASHER

PUMP

ASSEMBLY

Fig.
102 - Washer Pump Assembly

5. Remove gear mechanism from the gear box and slide

spacer washer (No. 9) off the gear assembly eccen-

tric shaft.

6. Slide the drive plate and shaft assembly (No.. 11) out

of the gear, assembly, remove the lock and drive

pawls (Nos. 12 and 13) and remove the coil spring

(No.
14).

Reassembly

1.
Assemble lock and drive pawls to the shaft and drive

plate assembly as shown in Figure 99.

2.
Install the assembled parts from Step 1 in the gear

and eccentric shaft as shown in Figure 100.

3.
Connect the coil tension spring between the lock and

drive pawls (fig. 100).
4.
Reinstall spacer washer on the eccentric shaft of the

gear.

5. Reinstall gear mechanism in the housing as shown in

Figure 101.

6. Reassemble the parts removed in Steps 1 through 4

under drive gear disassembly.

The washer pump and/or valve assembly (fig. 102) may

be removed from the wiper assembly as a unit; therefore

it is- not necessary to remove the. wiper assembly from

the vehicle if only the washer pump and/or valve assem-

bly requires service.

WASHER PUMP SECTION

PUMP REPLACEMENT

. To replace the washer pump assembly proceed as

follows:

1.
Raise vehicle hood and remove engine distributor

shielding and distributor cap.

2.
Remove lead wires from washer pump and disconnect

ground wire from screw retained connector; discon-

nect hoses from valve unit.

3.
Remove four screws which secure the washer pump

assembly to the gear box.

a* The water inlet and outlet valve assembly is

serviced as a unit if required; also the rotor cam

is serviced separately.

4.
Install washer pump and cover assembly so that the

slot in the washer pump cam fits over the pin on the

wiper unit drive plate.

5. Install the four washer pump to gear box retaining

screws, position ground lug under lower screw.

6. Connect valve inlet and outlet hoses, attach ground

lead and washer pump lead wires.

7. Install engine distributor cap and shielding.

8. Lower hood and check operation of wiper unit.

SPECIAL TOOLS

J-21932

BEZEL NUT REMOVER

Fig.
103 - Special Tools

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-61

R.H. FENDER

LAMP (1.6600)

R.H. PARK &
DIR.

S1G. LAMP.

L.H. PARK &
DIR.

SIG. LAMP

L.H. FENDER

LAMP (16600)

Fig.
104 - Front Lighting & Engine Compartment — Chevrolet

CHEVROLET CHASSIS SERVICE MANUAL