99 windstar van, won't turn over,won't start, headlights won't turn off,

You need to adjust the Switch, it thinks you are in Gear

-Check "headLight fuse"
-Check connector at the headlight.
-Check the bulb. (It could burn out)

Mai

Given the vehicle,age & all the terrible
transaxle problems on a windstar & vehicle
it replaced

Your transaxle has failed

Having once owned a trans repair shop

Get rid of it & never buy another van type
vehicle,any brand

Just as a precaution, please check the brake fluid reservoir on that model. There is a sensor at the base of the master cylinder which can leak brake fluid over the wiring circuit, and cause the electrics to short out. In some extreme cases this has caused fires in some vehicles. This is why Ford had issued a recall to this particular model in the states at least.

call the dealer or a auto locksmith but do try the spare key first

This happened to to me with my ranger. I went and bought in ignition and a junk yard and no problems after that. That way your not out of a lot of money.

check the relays under the hood, it should be on the drivers side in a box, with a plastic cover.

the light sensor,take it to a ford dealer

Clean the battery terminals.


Check the alternator voltage.


Just start the van if you have to.


Check the voltage at the battery terminals.

It should read 13.8V to 14.2V.


If the pully tensioner is from 1999 then it's time to change it.

Check belt the cracks.


After the tensioner change and belt change then double the voltage.

It has to be 13.8V or high.

If not then change out the failing alternator,


Please rate my answer if it's helpful to you.


Cheers,


MUSTGO.

The "door is locked" switch mechanism in the driver's door is not engaging when the door is closed. It is inside the door panel and right on the latch. It closes a circuot when the door is latched.

I was able to tighten the mounting on mine with some twist-wire and been right as rain for 3, 4 years now