i have a 98 civic ex coupe...i recently just changed the radio to an aftermarket radio and somehow after that the car will not start. i do not know if its related to the problem. but anwayi tried to start the car up and it just did not start. there was no cranking noise coming from the engine and i tested the battery and it was just fine. after trying to start it for a few times, suddenly theitems on the dash did not come on at all (oil,battery,srs,check engine, etc.)but when i turned on the lights the backlights did work on the dash. and also the radio and windows did not work when in the on position

 

Looks like loosely connected battery terminals. Try to clean them, re-seat and re-tighten.

 

Give your battery a jump. Its ****ed.

If not then There's something connected wrong. Who did your system?
Something's not connected right. The same thing happened to my cousins 00 civic.

 

anyone know which wires could cause the engine not to start where the radio is?