Hey guys, I'm new to this forum so I don't know if this is the right section to post in but hopefully it is.

So onto the problem. I recently came back from a week away with some friends and left my 01 civic si at home and when I came back and tried to start it no lights came showed up on my cluster. I thought it was the battery that was dead, maybe I left a light on or something? So I tried boosting it. Oddly enough, when I put the key in the ignition same thing happened. So I went to check the connections and my friend accidentally mixed the wires. So he hooked up the + and - on mine correctly but on his car he put the + where the - should have been and vise versa. When we corrected the problem the same thing happened, no lights on my cluster or anything. I'm kinda stuck. I don't know whether or not I should replace the battery, since it's a bit old, or did I blow a fuse? Any help would be good guys. Thanks

 

Main fuze it should be under the hood in a fuze box that would be a good place to start good luck mane

 

What does the main fuse look like? Sorry I'm such a noob. I've located the fuse box under the hood but I don't know which one is which.

 

Sounds like the first issue is main relay.after hooking up the jumpers backwards,probably popped the other main fuse in the engine compartment.

 

You guys are the best! Thanks for helping, it was the 80A fuse that was blown.