{"model":"mk2","model_name":"MK2 Supra","vehicle":"Toyota Supra A60 (1982–1986, 5M-GE)","document":"Repair Manual","section":"BE","section_name":"Body Electrical System","page":44,"pages_in_section":121,"title":"Body Electrical System","section_header":"Body Electrical System — Instruments and Sender Gauges","ocr_text":"BE-44\t\tBODY ELECTRICAL SYSTEM — Instruments and Sender Gauges\n\nSECTION\t\t\tTROUBLE\n\nE\t\tSpeedometer\t\tBrightness does not change when rheostat is turned\n\nOnly speedometer and tachometer?\tYes\t\tReplace speedometer\nNo\n\nOnly tachometer?\tYes\t\tRemove tachometer and\n\t\t\t\t\tconnect sub-harness (SST)\nNo\n\nRemove meter and connect sub-\nharness (SST).\n\n①With the ignition S/W at ON position, check that\nvoltage between terminals 4 and 6 of tachometer\nconnector is more than 3V with rheostat at MAX.\n\nOK\n\n②With the light S/W turned ON,\ndoes voltage between terminals 1\nand 7 of sub-harness vary from 0\nto 9V when rheostat is turned?\n\nYes\t\t\t\tReplace tachometer\t\tReplace speedometer\n\nNo\n\n③With the light S/W turned ON,does\nvoltage between terminals TR and E of\nrheostat vary when rheostat is operated?\n\nNo\t\t\t\tYes\n\nCheck rheostat\t\t\tBad wiring between\n(See page BE-18)\t\t\trheostat and meter\n\nRemove other meters and check for\tNo\t\t\tReplace speedometer\nbrightness change of speedometer.\n\nYes\n\nConnect other meters one by one\nto find bad meter.\n\nReplace bad 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