My 03 explorer will only start when we cross the cylinoid with a screwdriver. when we try to use the key, all the lights and everything works, it just won't start. it won't turn over

Try jumping the cylinoid post with a screwdriver with the key on if it starts you have a bad cylonoid most likely,if this is the case order a new one from amazon.com as they are much cheaper and good quality as to buying one from a bike shop

You should hear the fuel pump run momentarily when the key is in the Run position. Ensure the engine has a good spark by removing one of spark plug boots. Stick a phillips screwdriver in the boot, and hold the handle of the screwdriver, and allow the shaft near ground. (motor works best) Have someone crank the engine and look for a good blue spark arch from the screwdriver and engine. If your getting good spark, then check the fuel pressure on the fuel injection rail.

I checked the small wire and have power ???? What small wire ? The wire on the starter solenoid has B+ voltage when turning the key to start position ? If so and your engine isn't spinning over ,your engine is seized up. Try put a socket an breaker bar on the crankshaft bolt an try turning it by hand .

Sounds like a loose connection on the battery or starter. If not loose check the starter cylinoid

Is it clicking when u try and use the starter? your cylinoid may be bad,try crossing over the cylinoid with a screwdriver to see if it will turn over,also check for a blown fuse..

could be safety neutral switch on steering coloum under dash will it start in neutral ? use a test light to see if you are getting power at the starter when you turn key if not check switch under dash pull the 2 wire connector off and put a paper clip in both wires and see if it starts

try tapping stater with hammer then try to start it if it cranks starter is bad

It is the starter. You can cross a screwdriver across the solenoid to start it and drive....just "clack" it. It'll spark but you will get it to start running. Cross the screwdriver across the solenoid posts and tocuh the frame or engine....it'll start....just have the key in the "on: position.

Tap on starter with a hammer. If the car starts its your starter. or turn the key and go under the hood and put a screwdriver to both sides of the cylinoid switch and if starts its starter. Good luck and God Bless

Replace the starter solenoid, I have a 1985 F-150 and did the same thing, it worked, but if it didn't, I was going for the ignition switch next.