Get Taxonomy.php

My custom post type has categories. I am trying to make what is the equivalent of a category.php page. I have named it taxonomy.php.
The below code works, but I when I add a query to it, it stops working. Can someone tell me how to make the code below offset by -1 and still work for a custom taxonomy?

<?php get_header(); ?>

<ul>

<?php   if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
 <li>
 <a href="<?php the_permalink(); ?>"><h3><?php the_title () ?> </h3></a>
 </li>

<?php
	endwhile;
endif;wp_reset_query();
?>
</ul>

<?php get_footer(); ?>