"D" wrote: 1999 E150 STARTING PROBLEM
Vehicle doesn't start with turn of key. Have to 'hot wire'
by running a wire from the positive term. of battery to a
terminal on the starter solenoid.(key in the run position.)
Someone said the problem is the solenoid.
Your hot wire test shows that the solenoid works properly
when its start terminal is energized with 12V current.
The problem is somewere else; current is not getting to
the terminal under normal operation. Some of the things
that prevent start current from getting to the solenoid:
1.) Corroded/frayed wire connection at the solenoid terminal.
2.) Transmission park/neutral interlock switch defective/open.
3.) Ignition switch start position open/burned out/defective.
Wendy & John.