Accord L4-1955cc 2.0L SOHC FI (1987)
Main Relay (Computer/Fuel System): Testing and Inspection
Main Relay Harness Test
Main Relay Harness Test
1. Keep the ignition switch in the OFF position.
2. Disconnect the main relay connector.
3. Check for continuity between the Black wire (2) in the connector and body ground.
4. Attach the positive probe of voltmeter to the Yellow/Blue wire (1) and the negative probe to the Black wire (2)
Battery voltage should be available.
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If there is no voltage, check the wiring between the battery and the main relay as well as No. 1 fuse (10 A) in the under-hood relay box.
5. Attach the positive probe of voltmeter to the Black/Yellow wire (5) and the negative probe to the Black wire (2).
6. Turn the ignition switch ON.
Battery voltage should be available.
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If there is no voltage, check the wiring from the ignition switch and the main relay as well as No. 1 fuse (15 A).
