How do I know if my Honda Civic main relay is bad?
How to Tell if Your Honda Civic’s Main Relay Is Failing If your Honda Civic cranks but won’t start—especially when the cabin is hot—and you don’t hear the fuel pump prime for about two seconds at key-on, the PGM-FI main relay is a prime suspect on older models (roughly 1988–2005). You can confirm by listening …
