[dFlorez7]

My e350 has been my reliable work van until a very hot day last summer. Van starts every time but will not shut off when I switch the ignition. Then when I drive the van the sometimes the gauges go to zero and a lot of lights pop up on cluster. Then it goes back to normal. So what I have done is replace the ignition switch, and ignition lock cylinder. That isn’t the issue. I will say a week before this issue I replaced the alternator and replaced the negative battery terminal. Maybe it’s tied to that. I disconnected the sensor on the alternator and it no longer did the thing with gauges and lights, but the engine will not shut off. I need help I know it’s an electrical problem.

 

[Action]

What sensor on the alternator? (Post picture)
How do you shut the engine off if the key does not do it?
The ignition switch mounting is usually adjustable.

Action

 

[dFlorez7]

 

[dFlorez7]

The picture above is the connection I pulled from the alternator, there are 2 I pulled the bigger one out. I have been turning off my van by pulling a fuse.

 

[Action]

Connect the fuse
Remove a battery cable
Put a volt meter between the battery terminal and the disconnected battery cable.

You are measuring for current draw when the engine is off.

I suspect the ignition/engine is always on.
The ignition switch is not turning off the engine

Action

 

[bpetnoi]

You state that you replaced both the ignition switch and the key lock. I think you might have the ignition switch miss adjusted so that when the key is in the off position the rod going to the ignition switch is not pulling the contacts back to the off position. To test this you would have to get under the dash again and disconnect the rod to the switch. After disconnecting the rod manually push the switch forward or down towards the floorboard. BE VERY CAREFUL AS I DO NOT KNOW IF FORD USES THE IGNITION SWITCH IN ANY WAY AS A NEUTRAL SAFETY SWITCH. BLOCK THE WHEELS AND HAVE YOUR FOOT ON THE BRAKE. Start the vehicle, then reach down and pull the switch backward toward the key lock. If the engine turns off you do indeed have the switch misadjusted. Let me know if it works. You can do the same test by just removing the key lock cylinder and then operating the rod from top.