TSRM/MK3 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical System28 / 116
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Integration Relay — MK3 Supra Body Electrical System, page 28
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BE-28 BODY ELECTRICAL SYSTEM — Lighting System Test Bulb 3.4 W 12 11 10 9 3 BE0254 Test Bulb 3.4 W 12 11 10 9 3 BE0361 U.S.A. OFF 1 2 3 4 BE3995 BE3994 CANADA OFF 1 2 3 4 BE3916 Integration Relay INSPECT INTEGRATION RELAY INSPECT RELAY OPERATION (KEY ILLUMINATION) (a) Connect the positive (+) lead from the battery to terminal 12 and the negative (—) lead to terminals 3, 9 and 10. (b) Connect a 3.4W test bulb between terminals 11 and 12. (c) Check that the bulb lights. (d) Disconnect the negative (—) lead from the battery to terminals 9 and 10, and check that the bulb goes out 5 seconds later. If operation is not as specified, replace the relay. Light Control Rheostat INSPECT RHEOSTAT INSPECT RHEOSTAT OPERATION (a) Connect the positive (+) lead from the battery to terminal 2 (U.S.A.) or 1 (CANADA) and the negative (—) lead to terminal 3 (U.S.A.) or 4 (CANADA). (b) Gradually change the brightness of rheostat from minimum to maximum, to check that the voltage between terminals 1 and 3 increases from 0 to 12 V. (c) Check that there is no voltage between terminals with the rheostat turned off. If operation is not as specified, replace the rheostat.