My 1999 ford explorer will not crank unless you short the starter

SOURCE: won't start, starter will spin but will not engage fly wheel to crank up engine

Sounds like the starter drive is shot, best thing to do is replace starter with new or rebuild.

SOURCE: 1999 ford ranger xlt will not crank,

it will be in fuse box under hood or under dash your owners manual shows which relay it is or you can look in a haynes or chilton manual at your local parts house

SOURCE: 1999 ford e350 wont crank and i dont hear the selnoid

check your connection.

SOURCE: how do i replace the starter in a 1999 ford

Disconnect the negative battery cable. If it has automatic ride control, make sure it is turned off before you raise the vehicle. Remove the starter solenoid cover, if it has it. Disconnect the large cable from the starter motor and the solenoid connections. Remove the starter mounting bolt and nut and remove the starter from the engine. Reinstall in the reverse order.

SOURCE: where id starter relay on

follow the positive cable from the battery, it goes to your starter solenoid-a solenoid is a heavy-duty relay. On most earlier fords it is mounted on the fender, but newer ones have them attached piggy-back to the starter motor.