Wiper Linkage

Remove and replace the windshield wiper linkage assembly on a 1970 AMC Rebel Machine, including removal of wiper arms, cowl cover, and linkage mechanism.

Warnings

Tools required

Parts

• Wiper linkage assembly × 1 — Use OEM specification or compatible aftermarket
• Wiper arm retaining nut washers × 2 — Reuse if in good condition
• Cowl vent screen clips × 1 — Replace if broken during removal

Preparation

1. Park vehicle on level surface and engage parking brake
2. Turn ignition off and remove key
3. Using masking tape or grease pencil, mark the rest position of both wiper blades on the windshield for reinstallation reference
4. Open hood and secure in raised position
5. Disconnect negative battery cable to prevent accidental wiper motor activation

Procedure

1. 1

   Remove wiper arms
   Remove the retaining nut covers from both wiper arms. Using appropriate socket, remove the retaining nuts securing each wiper arm to the pivot shaft. Apply penetrating oil to the wiper arm base if corroded. Use a wiper arm removal tool or battery terminal puller to break the taper fit between the arm and pivot shaft. Rock the arm gently while pulling to avoid damaging the splines. Remove both wiper arms and set aside.
2. 2

   Remove cowl vent screen
   Locate and remove all fasteners securing the cowl vent screen (plastic or metal grille between hood and windshield). On the 1970 Rebel, these are typically Phillips head screws or clips along the rear edge of the cowl. Carefully pry up the screen starting at one end, working slowly to release any clips without breaking them. Lift the cowl vent screen away to expose the wiper motor and linkage assembly.
3. 3

   Disconnect wiper motor electrical connection
   Locate the wiper motor electrical connector on the passenger side of the cowl area. Press the release tab and disconnect the multi-wire connector from the wiper motor. Move the wiring harness aside to prevent damage during linkage removal.
4. 4

   Remove wiper pivot bezels and nuts
   From inside the cowl area, locate the wiper pivot shafts that extend through the cowl panel. Remove the chrome bezels (if equipped) and the retaining nuts securing each pivot assembly to the cowl. These are typically located on both driver and passenger sides. Keep all hardware organized for reinstallation.
5. 5

   Disconnect linkage from wiper motor crank arm
   Locate the wiper motor crank arm connection point where the linkage attaches. This typically uses a plastic or metal clip to secure the linkage ball socket to the crank arm. Use needle nose pliers or flat blade screwdriver to carefully pry the retaining clip off. Disconnect the linkage from the motor crank arm.
6. 6

   Remove wiper motor mounting bolts
   Remove the bolts securing the wiper motor mounting bracket to the firewall or cowl structure. On the 1970 Rebel, there are typically three mounting bolts. Support the motor assembly as you remove the final bolt to prevent it from falling.
7. 7

   Remove linkage assembly
   Carefully maneuver the entire wiper linkage assembly (including both pivot assemblies and connecting rods) out through the cowl opening. The linkage must be manipulated at an angle to clear the cowl structure. Work slowly to avoid bending the linkage rods or damaging surrounding components. If the linkage binds, check that all fasteners have been removed.
8. 8

   Inspect and clean mounting areas
   With linkage removed, inspect the cowl area for rust, debris, or water damage. Clean the mounting surfaces and pivot holes. Check the wiper motor mounting bracket for integrity. Inspect the firewall grommet where the motor mounts for deterioration and replace if necessary.
9. 9

   Prepare new linkage assembly
   If installing new linkage, compare it to the old assembly to verify correct application. Check that all pivot points move freely. Apply white lithium grease to all pivot points, ball sockets, and connecting rod joints. Ensure the linkage is in the park position (fully retracted) before installation.
10. 10

    Install linkage assembly
    Carefully maneuver the new or rebuilt linkage assembly into position through the cowl opening, reversing the removal procedure. Align both pivot shafts with their respective holes in the cowl panel. From inside the cowl, install the pivot retaining nuts finger-tight. Install the wiper motor mounting bolts and tighten securely.
11. 11

    Connect linkage to motor crank arm
    Attach the linkage ball socket to the wiper motor crank arm. Ensure the connection is fully seated. Install the retaining clip, making sure it is fully engaged and secure. Verify the connection by gently tugging on the linkage.
12. 12

    Final tighten pivot nuts and install bezels
    From inside the cowl, final tighten both wiper pivot retaining nuts securely. Install the chrome bezels (if equipped) over the pivot shafts. Do not overtighten as this can bind the pivot mechanism.
13. 13

    Reconnect electrical and test
    Reconnect the wiper motor electrical connector. Reconnect the negative battery cable. Before reinstalling the cowl screen, turn the ignition to accessory position and test the wiper operation through all speed settings. Verify smooth operation and correct park position. Listen for any binding or unusual noises.
14. 14

    Reinstall cowl vent screen
    Position the cowl vent screen back in place, ensuring all clips and mounting points align properly. Install all fasteners and tighten securely. Check that the screen is seated properly along its entire length.
15. 15

    Install wiper arms
    Position each wiper arm on its respective pivot shaft, aligning with the reference marks made during disassembly. The driver side arm should rest approximately 2 inches above the lower windshield molding when in park position. Press the arm firmly onto the splined shaft. Install the retaining nuts and tighten securely. Install the retaining nut covers.

Reassembly

1. Verify all fasteners are tightened and no tools are left in the cowl area
2. Ensure wiper arms are properly aligned and tightened to prevent slippage during operation
3. Check that cowl vent screen is fully seated to prevent water intrusion

Verification

• Test wipers through all speed settings and verify smooth, synchronized operation of both blades
• Confirm wipers park in correct position when turned off
• Check that wiper blades clear the windshield properly without hitting the cowl or A-pillars
• Verify no unusual noises, binding, or hesitation during operation
• Test washer function if equipped to ensure proper coordination with wiper system
• Inspect for any interference between linkage and cowl components

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