I have 4.10 gears installed and i have had a dallas mustang speedcal and today i was playing with some things and i ripped the power wire off the cigarette lighter, where it was attached with a eletrical clip thing (no clue what its called). Well i figured i might as well solder it back on that way it would have an even better connection. well i did this then when i went to drive the speedo didt work. Also the car would die when idleing. this is weird it had never done this before. then the check engine light came on. i checked the connection and everything looked right it was connected to the red wire and plugged into the cigarette lighter, but the ciagarette lighter wouldnt work also. Im guessing a fuse or something? but why would this cause the car to die? or is this maybe some bad gas or something and unrelated? i have no clue. anyone have any ideas?