The starter of the pickup will work if I jump it with a screw driver and the ignition is turning off and on because I checked all the wires with a tester. But none of the electronics turn on when I turn the key and the starter doesn't work from the key. I checked all the wires leading into the cab and they had power going to them. But it won't turn anything on at all.

 

Truck info would help! YEAR?

 

it's a 1991 d250

 

Do you get any response when you turn the key?

 

when I turn the key nothing happens at all. It acts like there isn't a battery in it. All of the wires i have checked leading into the cab have power. None of the ignition wires have power going through them, im not sure if theyre supposed to or not, but when you turn the key the wires that lead into the cab through the main hole change if they have power or not.