My 1.6 sentra wont start when key is turn to the on postion there is no dash lights come on engine doesnt turn over the battery is good headlights roof lamp and brake lights work i have no idea what to do help me if you have any ideas Thanks

 

check your main fuse (80amp) usually blows when jumper cables are put on backwords, your ignition fuse, starter fuse etc. if you have a ohm meter just check all your fuses to see if any of them are blown. cause i bet you just have a blown fuse probably your main fuse. check it and get back to me.

 

check fuses and they are good what are the big blue fuse above then regular fuse in the car