Did you create taxonomy-{your-slug}.php template ?
let’s say the slug is ‘locations‘
so, it will be something like this taxonomy-locations.php
if you haven’t created yet, create one and the template codes will look like this ,
<?php
/**
* Locations taxonomy archive
*/
get_header();
$term = get_term_by( 'slug', get_query_var( 'term' ), get_query_var( 'taxonomy' ) );
?>
<div class="wrapper">
<div class="primary-content">
<h1 class="archive-title"><?php echo apply_filters( 'the_title', $term->name ); ?> News</h1>
<?php if ( !empty( $term->description ) ): ?>
<div class="archive-description">
<?php echo esc_html($term->description); ?>
</div>
<?php endif; ?>
<?php if ( have_posts() ): while ( have_posts() ): the_post(); ?>
<div id="post-<?php the_ID(); ?>" <?php post_class('post clearfix'); ?>>
<h2 class="post-title"><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></h2>
<div class="content clearfix">
<div class="post-info">
<p><?php the_time(get_option('date_format')); ?> by <?php the_author_posts_link(); ?></p>
</div><!--// end .post-info -->
<div class="entry">
<?php the_content( __('Full story…') ); ?>
</div>
</div>
</div><!--// end #post-XX -->
<?php endwhile; ?>
<div class="navigation clearfix">
<div class="alignleft"><?php next_posts_link('« Previous Entries') ?></div>
<div class="alignright"><?php previous_posts_link('Next Entries »') ?></div>
</div>
<?php else: ?>
<h2 class="post-title">No News in <?php echo apply_filters( 'the_title', $term->name ); ?></h2>
<div class="content clearfix">
<div class="entry">
<p>It seems there isn't anything happening in <strong><?php echo apply_filters( 'the_title', $term->name ); ?></strong> right now. Check back later, something is bound to happen soon.</p>
</div>
</div>
<?php endif; ?>
</div><!--// end .primary-content -->
<div class="secondary-content">
<?php get_sidebar(); ?>
</div><!--// end .secondary-content -->
<?php get_footer(); ?>
here , you can customize as you want & be sure that you use your slug.
According to WordPress Hierarchy,
If no taxonomy-specific template ( taxonomy-{your-slug}.php ) is found,
then the taxonomy that lists pages will use the archive template ( archive.php )
If no archive template is found, then the taxonomy that lists pages will use the index template ( index.php )