gullwing

It is in the fusebox ( the one in the engine compartment , next to the battery ). Anyways, my car is fixed now ,It was the main engine relay and the ground cable for the fusebox ! Thanks to ALL !

UPDATE First, Thank You for the replies, I appreciate it guys ! Here's what happened today: I went to check the fuses that you guys mentioned, but before I even check a single fuse, I open the door and I realise there was power ! So I start the car and I drove it to my mechanic right away. ( I still need to have my alternator checked ) When it got to the shop It went totally dead again ! That's very weird...I'm stumped. Anyways my mechanic told me he played with the main engine relay ( a black relay ) and the power came back intermittently... So just to elminate this possibility I am getting a new main engine relay today and I'll let you know what happens afterwards.

Hi guys. I been having problems starting my car in the cold (93 LS400) but It would always start and run after a boost ( jump-start) . Today, I was supposed to go get a new battery and have my alternator checked , so I called my friend to give me a boost like he's done before and I reversed the polarity on the battery by mistake. ( I know I know...what a dumb mistake, but i didnt have my coffee and cigarette yet ! ). Anyways, after that happened , the car went totally dead, like there is no power at all , not even interior lights. WHat could cause this ? Is there a main engine fuse on these cars ? Or maybe the main engine relay is the one that fried ? What other damage should I expect other than blown fuses...you think my ecu could be fried as well ? Please help guys im really lost here. Thanks.