I have a 2007 mazda cx7.and I was traveling home from the trip.and the car started running ruff and shut off .i tried to start it it turns over sometimes. But lately it does nothing at all ..and I mean nothing..all the lights are lighting up..on the dash ..just put new starter relays and fuses.getting ready to get a starter..if I do that I hope it fixes this problem..but I think it's something else in the ignition..or the key..or crankshaft sencer.or I just don't know please send help about to loose my job..

 

You need to check an inline fuse that is mounted on the power cable to the starter. This is outside of the fuse box. Roughly 6inches away from the battery terminal.