Download 1992 Lexus SC 400 Window Regulator Repair Manual – To improve power door window serviceability on SC 400/300, GS 300, and ES 300, a wire regulator subassembly is now available as separate supply parts. REPAIR PROCEDURES: ^ ^ ^ Verify motor operates properly. If the motor must be replaced, change the complete regulator assembly. If motor operation is correct, replace only the regulator subassembly. Use the following procedures when replacing the subassembly. 1992 Lexus SC 400 V8-4.0L (1UZ-FE) WINDOW REGULATOR DISASSEMBLY: 1. REMOVE COVER PLATE ^ Remove the two screws and cover plate; see figure 1. Note: The screws and cover plate are reusable. ^ Pry up the cover plate tab using a small flat-head screwdriver and remove the plate. Use care not to damage the motor housing; see figure 2. Note: The cover plate is not reusable. 2. REMOVE WINDOW REGULATOR DRUM AND WIRE GUIDE FROM MOTOR HOUSING USING NEEDLE NOSE PLIERS (SEE FIGURE 3). Caution: Do not use a flat-head screwdriver to remove the drum and wire guide. WINDOW REGULATOR INSTALLATION: 1. INSERT THE WINDOW REGULATOR DRUM INTO THE MOTOR HOUSING. 1992 Lexus SC 400 V8-4.0L (1UZ-FE) Note: ^ To prevent the window regulator drum and cable from coming off, do not tilt the drum, subject it to shocks or use force. If the cable comes off the drum, do not rewind the cable or reuse it. After the window regulator is installed, do not operate it manually (some window regulators do not utilize a stopper).