electrical
Window Motor and Regulator - Front
for 1970 AMC Rebel Machine 390ci V8 · RWD
Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Lexus & Toyota Mechanic · 20+ years
Difficulty
Moderate
Time
2.8 h
Tools
11
Steps
14
✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.
Remove and replace the front window motor and regulator assembly, including removal of interior door panel and disconnection of electrical components.
Warnings
⚠Support the window glass before disconnecting the regulator to prevent it from dropping and shattering
⚠The window regulator spring is under tension and may release suddenly during removal
ℹ️Disconnect battery negative terminal to prevent electrical shorts during motor replacement
Tools required
Phillips head screwdriverEssential
Flat blade screwdriverEssential
Door panel clip removal tool
10mm socket and ratchetEssential
1/2 inch socket and ratchetEssential
Needle nose pliersEssential
Wire cutters/strippers
Electrical tape
Window support (wood block or similar)Essential
Torx driver set
Trim removal tool set
Parts
- Front window regulator assembly × 1 — Use OEM specification or quality aftermarket
- Front window motor × 1 — Use OEM specification or quality aftermarket
- Door panel retaining clips × 1 — Replace as needed
- Window regulator rivets or bolts × 1 — If regulator is riveted
Preparation
- Disconnect negative battery cable
- Roll window to approximately mid-position for easier access to bolts
- Park vehicle on level surface and engage parking brake
- Prepare clean workspace for door panel and hardware storage
Procedure
- 1Remove window crank handle or switch assemblyIf manual windows, use a cloth behind the crank handle to locate and remove the retaining clip, then pull handle off. If power windows, carefully pry the switch bezel and disconnect the electrical connector before removing the switch assembly.
- 2Remove door panel retaining screwsLocate and remove all Phillips head screws securing the door panel. Typically found along bottom edge, in armrest, and around door pull handle. On 1970 Rebel, expect 5-7 screws depending on trim level.
- 3Detach door panel from doorUsing door panel tool or flat blade screwdriver wrapped in cloth, carefully pry panel clips free from door frame starting at bottom corners. Work around perimeter, then lift panel up and away from door frame lip at top.
- 4Remove moisture barrierCarefully peel back the plastic moisture barrier sheet to access window mechanism. Take care not to tear it; use a heat gun on low if adhesive is stubborn. Fold barrier out of the way but keep intact for reinstallation.
- 5Support and secure window glassRoll or manually position window glass to full up position. Wedge wood blocks or similar support between glass and door frame, or tape glass in position to prevent it from falling when disconnected from regulator.⚠Ensure glass is firmly supported before proceeding to prevent glass damage or injury
- 6Disconnect window motor electrical connectorLocate the window motor electrical connector inside door cavity. Disconnect by depressing locking tab and pulling connector apart. Note wire routing for reinstallation.
- 7Disconnect glass from regulatorLocate the two bolts or clips securing window glass to regulator lift channel, accessible through door access holes. Remove fasteners using 10mm or 1/2 inch socket. Carefully separate glass from regulator mechanism.
- 8Remove window motor mounting boltsLocate the three motor mounting bolts securing motor to door inner panel. Remove bolts using 1/2 inch socket. Motor may be attached to regulator assembly or mounted separately depending on configuration.
- 9Remove regulator assembly mounting boltsRemove the regulator mounting bolts from door inner panel, typically 3-4 bolts located along regulator track. Use 10mm or 1/2 inch socket as needed. Note position of any shims or spacers for reinstallation.⚠Regulator spring tension may cause assembly to shift during removal; maintain control of assembly
- 10Extract regulator and motor assemblyCarefully maneuver the regulator and motor assembly out through the large access opening in door inner panel. May require tilting and rotating assembly to clear door frame. If regulator is riveted, drill out rivets as necessary.
- 11Install new regulator assemblyGuide new regulator assembly into door cavity through access opening. Position regulator mounting holes to door panel holes. Install mounting bolts finger-tight initially to allow adjustment. If using rivets, drill new rivet holes and install per manufacturer instructions.
- 12Install window motorPosition new window motor to mounting location on door or regulator assembly. Install mounting bolts and tighten securely. Connect motor electrical connector ensuring positive locking engagement.
- 13Reconnect window glass to regulatorRemove temporary window support. Lower glass into door and align mounting holes with regulator lift channel. Install fasteners and tighten securely. Reconnect battery to test operation before final assembly.
- 14Test and adjust window operationCycle window up and down through full range of motion multiple times. Verify smooth operation without binding. Adjust regulator mounting bolts if necessary to achieve proper glass alignment in channel. Tighten all regulator mounting bolts once adjustment is complete.
Reassembly
- Reposition moisture barrier carefully, ensuring complete seal around door perimeter
- Align door panel over door frame and press clips firmly into place
- Reinstall all door panel retaining screws
- Reinstall window crank handle with retaining clip or power window switch assembly
- Reconnect negative battery cable
Verification
- Cycle window up and down multiple times to verify smooth operation through full range
- Check that window seals properly at top of door frame when fully closed
- Verify no unusual motor noise or binding during operation
- Confirm door panel is secure with no rattles
- Test that window stops correctly at full up and full down positions