i have a 2000 excursion with the 7.3 in it. when i turn the key it wont crank over but i can jump the sylinoid and it will fire right up. i replaced the sylinoid and i dont know what else it could be

 

Ck fuses and neutral safety switch first . Try starting it in neutral and playing with shifter while trying to start .

 

Where is the neutral safety switch. And It won't start in neutral or when I'm playing with the shifter

 

Neutral switch is part of the PRNDL switch . Mounted on transmisson , driver side behind shift linkage where cable attaches . You might have a bad switch or wiring . Here is where a wiring diagram would help . It could be wiring , relay , Igniton switch ect.

 

Or something else entirely ! Just a thought .

 

HAHAHA

 

When I started my truck this morning it was hard to put it in to reverse. Could that be because the PRNDL switch is bad

 

Funny , I know . But the reason I said that is it could be something strange . I just worked on a 98 ranger that would not turn off .Igniton switch disconnected , truck still ran . The friggin headlight switch was bad , backfeeding to the dash and GEM .keeping the ecm powerd up ! No wiring issues , internal switch problem .Go figure . Ain't seen that before . Tell that one to your buddies . They won't beleive it either .

 

Could be mechanical , not likley the switch . Did not read where you are , Ice build up can cause issues like you describe . Parked on a grade with parking pawl loaded , ect .