- 1). Disconnect the grounding cable from the negative lead post on the Corolla's battery. Use a 10mm wrench to loosen the cable's clamp and rest the cable away from the battery until the installation is finished.
- 2). Pry the center dash panel away from the dashboard with a flat screwdriver. Start at the bottom edge of the panel and create space to fit your hands. Work your hands around the perimeter of the panel until it is free from the dashboard. The panel will still be connected to the vehicle by wiring to the clock and hazard controls. Place the pale on top of the dash, out of the way, until you are ready to replace it on the dashboard.
- 3). Remove the four 8mm bolts from the corners of the stereo mounting bracket around the radio. Use a Phillips-head screwdriver for the screws and store them in the cup-holder for the upcoming installation
- 4). Pull the radio from the stereo mounting dock and disconnect the wiring to the back of the stereo. Connect the wiring to a wiring harness adapter. The adapter will allow the Toyota wiring to connect to the aftermarket stereo.
- 5). Connect the leads of the wiring harness adapter to the new stereo. Slide the new radio into the mounting bracket left vacant by the old radio. Screw in the four bolts with the Phillips-head screwdriver.
- 6). Replace the center trim panel surrounding the stereo. The panel will snap into place by hand. Start by aligning the top edge of the panel and press it against the dashboard around the perimeter.
- 7). Replace the grounding cable clamp around the negative battery lead on the Toyota's battery. Tighten the clamp with the wrench.
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