Hello there! I have a problem with my honda civic '93.I parked one night and in the morning when I tried to start it nothing happened... just hearing click and nothing doesn't cranks.I checked the batery wires were OK.mine has ECU but I can't find the main relay... its not there!I don't know if has injection because there is not pgm it is something else.. HOW IT IS POSSIBLE?? It is a carb?. but why a ecu wich is working? The car started a few times .it is possible to be the igniter switch broken?? PLEASE HELP!

. If starter motor doesn't crank:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563-3.html#post235560

. If starter motor cranks, but engine doesn't start, perform tests in Sections A and B below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563.html