Above picture is just an illustration for 1991 Toyota Wiring Diagram. These wiring diagrams applies for 1991 Toyota which includes Camry, Celica, Corolla, Cressida, Land Cruiser, MR2, Pickup, Previa, Supra, Tercel, 4Runner. The wiring diagrams contain in this manual is a general wiring schematic. The PCM sends ignition voltage through circuit 225 to the L terminal of the generator. The voltage regulator acknowledges this voltage along with generator rotation. Download the 1991 Toyota Auto Wiring Diagram here (pass: wiringdiagrams21.com).