1999 Ford Windstar Tail lights do not work

Have the main light switch and the rear electronic module.

It is going to be a bad ground or the rear electronic module. Here are the taillight wiring diagrams so you can see how the system works. this guide that can help as well:

https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out


Check out the images (below). Please let us know what happens.