Is Your taxonomy-product_cat.php File Not Working?

Is your taxonomy-product_cat.php file not working? All you may need is to add your WooCommerce theme support to your theme function’s file.

Adding theme support for WooCommerce taxonomy templates

To allow your taxonomy-product_cat.php file to register, you must add the WooCommerce theme support to your WordPress theme’s functions.php file.

add_theme_support( 'woocommerce' );