Car stalls

Hi and thanks for using 2CarPros.

Since the lights go out, the first thing I would be checking is for a weak or damaged ground. It sounds like something is shutting down everything. First, take a look at the first picture I attached, it is of the engine control module's ground location. I added that one because it shuts the engine off. However, the second is where I feel the problem may be. The second picture is of the primary "all activity" ground. Check these and let me know what you find.

I noted you indicated you are a mechanic. Most likely, you won't need these, but I am adding them in case you do.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

If you need anything else, let me know.

Take care and Happy New Year,
Joe