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MICRO-RELAY DESCRIPTION A micro-relay is a conventional International Standards Relays cannot be adjusted or repaired and, if faulty or OPERATION A micro-relay is an electromechanical switch that uses a low current input from one source to control a high current DIAGNOSIS AND TESTING - MICRO-RELAY 1. Remove the relay from its mounting location. 2. A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 3. If not OK, replace the faulty relay. 3. Resistance between terminals 85 and 86 (electromagnet) should be 67.5 - 82.5 ohms. If OK, go to Step 4. If not OK, replace the faulty relay. 4. Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, reinstall the relay and use a DRBIII T scan tool to perform further testing. Refer to the appropriate diagnostic information. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and con- REMOVAL 1. Disconnect and isolate the negative battery cable. 2. Remove the relay by grasping it firmly and pulling it straight out from its receptacle. A slight back and fourth rocking motion may help the removal process. 8W - 97 - 20 8W-97 POWER DISTRIBUTION KJ |