When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Umm, it could be the starter solenoid. My 150 was doing the same thing and i replaced it for around 30 bucks. Good to go. Other than that it could be a fuse, broken/rotted/shorted wire, bad ground, fusible link or bad switch. Which I would rule out because she turns when you jump it.
first, make sure the shifter is completely in park if it is an automatic, or in neutral with the clutch fully depressed if a stick shift.
if it still will not start after that, reach under the dash and fee along the top of the steering column for a 1/8 inch rod.
turn the key to run and feel to see if the rod moves when you turn the key to start.
if it does not move, then the ignition actuator in the column is most likely bad.
you can also usually tell if the actuator is bad if you do not feel any resistance when turning the key to start.
another possibility is a bad ignition switch.
it is located on top of the column, down near the brack pedal. the small rod goes from the key down to the switch.
to test/remove the switch you will have to lower the column to access the plug and 2 bolts holding the switch to the column.
the early trucks (87 to 89) had a problem with the ignition switches separating.
it is possible you may have one of the bad switches in yours.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.