Is there a way to use a custom field (image_src) to show an image in the Excerpt on the category pages? I don't have an image in the post itself so just trying to figure out if the custom field can be used to do this.

If possible, what is the code and where would it go in the Theme?

How about using the featured image on the post?

There isn't a featured image. The posts don't have an images in them and I'm using the image_src as a custom field so the nrelate Plugin will work. Just trying to figure out if I can also use that custom field to show the same thumbnail in excerpts.

There is probably some way if you did into the code but you could also just add the image you are pointing to in the custom field as the featured image of the post. That image will show up in the excerpt.

Well unless I'm completely missing something using the Featured Image Adds the image to the post. I don't want the image to display in the post. Also, when I tried this just now the image did show up in the post but not in Excerpt.

When I tried it the image showed in the excerpt and not the post. Hmmm.