I have honda ex 92 and i didn`t hear the sound of the main relay assy work,i wate about 15 min` after that a turn the swich on and i hear the relay work and the car start on,
can same one help what its can be the problem?
i check the voltage in the relay and i don`t undestand what`s the problem?

 

Repair or replace the main relay

http://techauto.awardspace.com/mainrelay.html

 

thank you, i will replace the main relay.

 

I dont here a slight humming noise that coming from under the rear seat when i turn the ignition two clicks,what its can be the problem?

 

Assuming you are being serious right now...

This means your fuel pump isn't priming. There are many possible causes of this:
1. fuel pump is bad
2. main relay is bad
3. ECU is bad
4. the wiring between any of the above is bad

 

No progress on this issue in 3 months?

Read this.
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/%2A%2A%2A-basics-no-start-diagnosis-101-%2A%2A%2A-1992733/

 

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