{"model":"mk3","model_name":"MK3 Supra","vehicle":"Toyota Supra A70 (1986.5–1992, 7M-GE / 7M-GTE)","document":"Repair Manual","section":"BE","section_name":"Body Electrical System","page":6,"pages_in_section":116,"title":"Body Electrical System","section_header":"Body Electrical System — General Information","ocr_text":"BE-6\n\nBODY ELECTRICAL SYSTEM — General Information\n\nCheck for Voltage\n\n(a) Establish conditions in which voltage is present at the check point.\n\nExample:\nA — Ignition SW on\nB — Ignition SW and SW 1 on\nC — Ignition SW, SW 1 and Relay on (SW 2 off)\n\n(b) Using a voltmeter, connect the negative (—) lead to a good ground point or negative (—) battery terminal and the positive (+) lead to the connector or component terminal. This check can be done with a test bulb instead of a voltmeter.\n\nCheck for Continuity and Resistance\n\n(a) Disconnect the battery terminal or wire so there is no voltage between the check points.\n\n(b) Contact the two leads of an ohmmeter to each of the check points.\n\nIf the circuit has diodes, reverse the two leads and check again.\n\nWhen contacting the negative (—) lead to the diode positive (+) side and the positive (+) lead to the negative (—) side, there should be continuity. When contacting the two leads in reverse, there should be no continuity.\n\nHINT: Specifications may vary depending on the type of tester, so refer to the tester's instruction manual before performing the inspection.\n\nCheck LED (Light Emitting Diode) in the same manner as that for diodes.\n\nHINT:\n• Use a tester with a power source of 3V or greater to overcome the circuit resistance.\n• If a suitable tester is not available, apply battery voltage and check that the LED lights 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transcript of a scanned Toyota factory manual page; verify critical values (torque specs, part numbers) against the image."}