Nu-Rex Electric Wiper Assembly with Switch
Replacement windshield wiper assembly for Model A Ford closed cars.
(Not recommended for slant windshield or open cars.)
Installation Instructions
All Years
Disconnect the battery and remove existing wiper from
windshield. Support the windshield in the full open position
the windshield frame.
using a padded box or similar non-damaging item.
Remove the windshield support swing arms and open the
Read ALL the instructions before installing the wiper.
1928-1929
1. Modify the supplied switch bracket as shown in Fig. 1.
2. Mount the switch and harness onto the bracket (Fig. 2.)
3. Assemble the kit supplied wiper components as shown
in Fig. 7.
4. Remove the dash rail vertical screw (second from left
drivers side located) and replace it with the kit supplied
longer screw (Fig. 3). This creates a provision under
the dash to fasten the switch bracket and harness.
5. Tighten the modified switch bracket with the kit supplied
washer and nut onto the newly created screw provision.
The switch should be toward the passenger compartment
(Fig. 4). Important! Remove any dash rail paint under the
switch bracket to ensure that the bracket makes good
ground contact with the dash rail.
6. Remove driver side vertical garnish molding.
7. Guide the loose end of the switch harness with the three
wire terminals up through the narrow space of the driver's
side dash support, up through the hollow cowl post cavity,
then over to the wiper motor location (Fig. 6A).
8. Carefully slide the three wires (one at a time) into the
wiper location hole (Fig. 8). Pull the three wires through to
the outside of the windshield. DO NOT pull the black
harness jacket out through the hole. Bend the three wires
down flat toward the glass.
9. Mount the new wiper motor to the outside of the
windshield frame using the original mounting holes with
the two kit supplied screws. Install the nuts on the inside
in the windshield hinge trough and tighten.
10. Fasten the three wires from the switch to the motor as
shown in Fig. 9. Do not over tighten the screws.
POSITIVE and NEGATIVE GROUND: RED to (+),
BLACK (BLK) to (-), and BLUE (BLU) to (S).
11. Carefully review the black wire route through the
windshield hinge trough, around the corner of the
windshield frame, then down the vertical garnish molding
or through cowl post cavity (’28-’29) area. Re-install the
garnish molding using original screws, holding the wire in
place. Secure the black wire jacket (near the wiper motor)
under the wiper motor screw thread to hold the jacket in
the trough.
12. Remove the windshield support prop and lower the
windshield. Ensure clearance of the new wire harness
around the windshield opening.
13. Route the RED wire with fuse holder forward toward the
firewall then across the firewall to the junction box. Tuck
the wire under the top edge of the cardboard kick panel
where needed to hold in place.
1930-1931
1. Mount the switch and harness onto the bracket (Fig. 2.)
2. Assemble the kit supplied wiper components (Fig. 7).
3. Remove driver side vertical garnish molding and
interior dash rail.
4. Temporarily fasten the switch bracket to the inner dash
rail support at the far left side (driver's side) screw
hole, using a dash rail screw. Point the switch handle
toward the floor. The switch and and wires should be
toward the firewall (Fig. 5).
5. Guide the loose end of the switch harness with the
three wire terminals up through the narrow space of the
driver's side dash support, up the vertical windshield
post, then over to the wiper motor location (Fig. 6B).
6. Continue with Steps 8 through 15 below. Then continue
with Step 6a.
6a. Remove the screw temporarily locating the new wiper
switch bracket. Remove paint from the dash rail
where the bracket will be mounted. Re-install the dash
rail positioning the switch bracket under the rail. This
will expose only the switch at the bottom of the dash rail.
7. Finish installation with Step 16 below.
14. Under the hood, remove the (2) junction box half-wing
nuts and remove the junction box cover. Remove the
nut from the driver’s side junction box stud and
connect the RED wiper fuse wire (Fig. 10). Replace
the nut, cover, and (2) half-wing nuts.
15. If applicable, remove the vacuum wiper line between
the engine intake manifold and the firewall. Install the
kit supplied block-off plug into the intake manifold.
16. Reinstall the windshield support swing arms. Reconnect
the battery.
Notes: (Additional wiper & fuse information on Sheet 2)
1. To adjust wiper blade tension against the glass, remove
the two screws that fasten the motor to the windshield
frame then carefully bend the arm. Attempting to adjust
the tension without removing the screws can severely
damage the wiper and or wiper arm.
2. To center the wiper sweep, loosen the flat blade
screw on the upper wiper arm then retighten after
adjustment.
3. The automatic parking device built into the wiper motor
parks the wiper blade to the right (toward center) when
switched off. This position is proper for left hand drive
cars but is not proper for right hand drive cars. This
function cannot be changed.
4. IMPORTANT! Extra care and patience is required
when routing the black wiper wire from the motor to
the switch to assure clearance when the windshield is
opened and closed to avoid damage to the wire.
5. Use 3 AMP fuse ONLY.
P.O. Box 9332, Akron, OH 44305
330-784-5334 www.nurex.com
RCG 02/29/2012
(Rev. 05/2012)
CUT
LINE
MOUNT THE SWITCH
WITH THE HANDLE
POINTING TOWARD
THE FLOOR
BEND THIS
PORTION AS
SHOWN
1928-1929
SECOND DASH RAIL SCREW FROM DRIVER'S
SIDE. REPLACE WITH KIT SUPPLIED LONGER
SCREW. MAKE SURE THAT THE SCREW MAKES
GOOD GROUND CONTACT WITH THE DASH RAIL
1930-1931
90º
BEND
LINE
DRIVER'S
SIDE
OUTSIDE VIEW
CUT AND
DISCARD
TOP PORTION OF
BRACKET
1
3
2
TO WIPER
MOTOR
(FIG. 8)
REMOVE DASH RAIL PAINT UNDER
SWITCH BRACKET BEFORE MOUNTING
BRACKET TO DASH RAIL
TO WIPER
MOTOR
(FIG. 8)
FAR LEFT SIDE
SCREW HOLE
SWITCH LEG OF
BRACKET TOWARD
PASSENGER
COMPARTMENT
INNER DASH RAIL
SUPPORT
GUIDE THE HARNESS
UP THROUGH THE
HOLLOW COWL POST
CAVITY
SHORT BRACKET
LEG TOWARD
FIREWALL
ROUTE THE HARNESS
UP THE VERTICAL
WINDSHIELD POST
FROM WIPER
SWITCH
5
4
WINDSHIELD POST
COWL POST
FROM WIPER
SWITCH
NOTE: HARNESS ROUTINGS SHOWN ARE TYPICAL AND
MAY VARY BY BODY STYLE AND YEAR
1928-1929
6A
1930-1931
6B
WIPER ARM
ACTUATOR
ROUND NUT
WIPER ARM
ASSEMBLING THE WIPER
1. INSTALL A RUBBER BOOT AT EACH END OF
THE WIPER MOTOR FRAME.
2. REMOVE THE SQUARE HEAD SCREW AND
ROUND NUT FROM THE WIPER ARM.
3. POSITION THE WIPER ARM ON THE WIPER
ARM ACTUATOR. SLIDE THE ARM TOWARD
THE MOTOR SO THAT THE NOTCH IN THE
ARM IS AROUND THE MOTOR SHAFT.
4. RE-INSTALL THE SQUARE HEAD SCREW AND
ROUND NUT.
5. SECURE THE WIPER BLADE TO THE WIPER
ARM WITH THE KIT SUPPLIED COTTER PIN.
FASTEN THE SWITCH WIRES
TO WIPER MOTOR AS SHOWN.
BLU
CONNECTIONS ARE THE SAME
FOR EITHER A POSITIVE OR
NEGATIVE GROUND SYSTEM.
BLK
IMPORTANT! DO NOT OVER
TIGHTEN THE SCREWS ON
THE WIPER MOTOR.
MOTOR MOUNTING HOLES
NOT USED
SQUARE
HEAD
SCREW
BLACK RUBBER BOOT
COTTER PIN
RED
WIPER MOTOR SWITCH CONNECTIONS
VACUUM WIPER HOLE PATTERN
(INSIDE VIEW)
MOTOR MOUNTING HOLES
NOT USED
WIPER
BLADE
7
ELECTRIC WIPER HOLE PATTERN
(INSIDE VIEW)
FROM
FUSE
(S)
(-)
(+)
9
10
8
IMPORTANT FUSE AND WIPER
INFORMATION
YOUR NU-REX ELECTRIC WINDSHIELD
WIPER IS EQUIPED WITH AN INLINE FUSE
HOLDER AND FUSE.
REPLACE WITH A 3 AMP FUSE ONLY.
REPLACEMENT WIPER BLADES MUST BE
MODIFIED TO MATCH THE KIT SUPPLIED
BLADE AS FOLLOWS:
REMOVE THE HOOK AND DRILL THE HOLE
BEFORE USE.
RCG 02/29/2012
(Rev. 05/2012)