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Light Control Rheostat: Corolla

  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 Figure.
  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 from bright side to dark side. See Figure. Test light brightness should change from bright to dark. If operation is not as specified, replace light control rheostat.