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RAV4, Tacoma, Tundra & 4Runner

  1. Remove light control rheostat. Light control rheostat is located on left side of instrument panel. Using jumper wires, connect positive battery terminal to light control rheostat terminal No. 1 and negative battery terminal to terminal No. 2. See Fig 2.
  2. Connect a 12-volt, 3.4-watt test light between light control rheostat terminals No. 1 and 3. Slowly rotate light control rheostat knob counterclockwise from bright side to dark side. Test light should turn off. See Fig 2.
  3. Slowly rotate light control rheostat knob clockwise from dark side to bright side. Test light should change from dark to bright. If operation is not as specified, replace light control rheostat.
Fig 1: Testing Rheostat Light Control (Land Cruiser & Sienna)
G98H10808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Testing Rheostat Light Control (RAV4, Tacoma, Tundra & 4Runner)
G98I10817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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