I have a 2001 f150 I just purchased for a decent deal only problem is it won't start when you crank the key so to bypass this i jump the solenoid i replace the solenoid with a know good but still nothing, the theft light doesn't flash but the lights on the dash and the radio are flashing and are using the blinker sounds, guy I bought it from thinks its the neutral safety switch, because he hit a tree backing up and thought it was pushed up a little bit i got under there and made sure the lines matched and still nothing

 

Check the see if it has a water leak from the windshield into the GEM module on the right hand side passenger kick well.

 

what would be tell tail signs of a leak and if it is leaking would that possibly be the problem? And what does it require to change that is it like the security system have to replace the whole system

 

The GEM module is on the other side. That ain't it, anyway since the GEM module cannot cause the stated symptom.

OP: You likely have a rotted out ground. Remove both kick panels and inspect all of the grounding studs for corrosion and body rot.

 

Its above the fuse panel on the 2001 right

 

Yes, but that's not the problem.

 

what do you think it is?
and the solenoid I just is the starter solenoid

 

Read post #4.

 

So you think its a ground problem?
is there a diagram of where all the grounds are at will check all to make sure

 

So I checked the grounds and none looked horrible any other suggestions