How do you turn on the ignition of a Ford Econoline van without key?

You can't reliably turn on the ignition of a Ford Econoline van without a key, unless you're dealing with a very specific, unusual circumstance (like a faulty ignition switch, and even then it's risky). Modern Ford Econolines have sophisticated anti-theft systems that prevent starting without the properly coded key or a compatible key fob.

Attempts to bypass the system are illegal and potentially dangerous, as they might involve tampering with the wiring, which can cause damage and create fire hazards.

If you're locked out, you should contact a locksmith specializing in automotive lockouts. They have the tools and expertise to unlock your van without damaging it. Trying to circumvent the security systems yourself is strongly discouraged.