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Fixing Main Relay on CRX Si 1990.

This problem have been hunting me for a number of years and finally I got it fixed.
    Symptoms: Car sometimes would start and die almost immediately especially if the weather is hot.
    Reason why car won't start: main relay wouldn't fire up the fuel pump due to the soldering cracks on Mian Relay PCB. Cracks would appear over time and can be re-soldered.

Testing the Main Relay

1. Remove the main relay.
2. Attach the battery positive terminal to the No. 4 terminal and the battery negative terminal to the No. 8 terminal of the main relay. Then check for continuity between the No. 5 terminal and No. 7 terminal of the main relay.
   • If there is continuity, go on to step 3.
   • If there is no continuity, replace the relay and retest.
3. Attach the battery positive terminal to the No. 5 terminal and the battery negative terminal to the No. 2 terminal of the main relay. Then check that there is continuity between the No. 1 terminal and No. 3 terminal of the main relay.
   • If there is continuity, go on to step 4.
   • If there is no continuity, replace the relay and retest.
4. Attach the battery positive terminal to the No. 3 terminal and battery negative terminal to the No. 8 terminal of the main relay. Then check that there is continuity between the No. 5 terminal and No. 7 terminal of the main relay.
   • If there is continuity, the relay is OK; If the fuel pump still does not work, go to Harness Test.
   • If there is no continuity, replace the relay and retest.

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