Heater corerepair video 1996 Mercury marque

Here is a general heater system wlkthrough link;

https://www.2carpros.com/articles/car-heater-not-working

Here are the specific instructions to R&R the heater core in your car;

Also, here is a diagram of the heater box in your car.

Sorry, those instructions look far to small to read. Here is a more reasonable version.

If you still can't read it or have any other questions, I will be working most of the night and will get back to you ASAP.

I am really sorry. I am using a new program to display text and it is a learning experience.

Here is a third attmpt at the instructions.
I think they are big enough. If they are not I will type them out for you.

Sorry for taking so long.