The following wiring diagram and cable routing apply for Toyota Supra MR2 1993 model year. This manual provides information on the electrical circuits installed on vehicles by dividing them into each system circuit. Electrical circuits of each system are shown from the power supply through ground points. Wiring connections and their positions are shown and classified by code according to the connection method. The actual wiring of each system circuit is shown from the point where the power source is received from the battery as far as each ground point. (All circuit diagrams are shown with the switches in the OFF position.)
Content: Foreword, Introduction, How to use the Manual, Troubleshooting, Abbreviations, Glossary of Terms and Wiring Diagram Symbols, Relay Locations, Electrical Wiring Routing, Power Source, System Circuits, and Ground Points.
Find more information about Toyota Supra MR2 Wiring Diagram and Electrical System Circuit here. (source: mr2.com)