I am not certian about the 88 Civic, but the main relay on other hondas is called the Mitsuba Relay. It is responsible for the fuel pump and sending power to the ECU(among other things). The 88 Civic might be to old for either of these. Try Honda-tech.comLots of good information on there. Just do a search for your car and Main Relay or Mitsuba Relay.