I've found it very hard to find a non technical co-founder who actually brings something to the table other than an idea like "let's do Uber for Pet sitters!".
As a technical person, I'm mostly interested in finding a co-founder who would have solid domain knowledge, or have experience pitching to VCs, or any other skill that can actually contribute to the execution of the idea.
Ideas are cheap, everyone has ideas, a good co-founder will help with the execution and there is plenty to do apart from the technical aspect.