My car no longer has fuel or spark. It just cranks. It ran fine before. Would grounding out the electriacl system on accident blow the main relay?

 

I don't know if that would blow the relay or not. Some symptoms of a bad relay would be intermittent starts, starts revs up and then loses fuel pressure and won't crank over after that. Then you give it 5-10 min. and it starts up fine. Some of the things that I experienced. You can always pull the relay out and test across the designated circuits with a DMM for continuity.

 

http://autorepair.about.com/li...c.htm

Check your ECU fuse as well.