Connected Battery backwards...ouch!

well i had a little time to think about what you could have.One way to make an electric fuel pump safer is put in a timed relay with a preshure switch.the relay would have NCTO on it.normal closed timed open.the presher switch would be N.O. normal open hooked across the normal closed contact on the timed relay.the relay would be closed when you first put the key on and then time open. by then the moter should be running and the presher switch would be closed maintaining power on the fuel pump as long as motor is runing maintaining oil preshure.Thats one way to do it.Thats the same concept thats used in modern cars.My circiut is just a little on the primitive side.I hope i didn.t confuse you but its posible thats what you have and when you reversed the polarity you damaged the timer. Hi cuda chick.That reverse thing is a caryover from the old days with generators. It would not apply to alternators for they generate ac and then use bridge rectifiers to change it to dc.have a nice day everybody.