oooooopssss wrong way
 

ok heres the deal...i have a 87 supra na and my friend decided he was gonna buy me a new batt for my birthday so i was like ok ...so he hooked it up and the dumb ass crossed the terminals and then all kinds of smoke came out from the under hood fuse box and now nothing starts or turns on but the horn but therespower to the coil and no power to anything else in the whole car ....i checked fuses and relays they look good ....can someone please help:x:

hmm smoke means something burnt up. so the problem is it wont start? does it crank?

something to think about: heard someone says they were jumping there sup and put the jumpers on the wrong terminals and car wouldnt start afterwards, turned out fried the ecu.

that would suck if he fried the ecu