Aside from all the legalities about Dalton needing an A&P if he could locate someone local who knows how to use a meter to troubleshoot that plus a phone call to someone familiar with planes might allow him to get his issue located and fixed.
Or find a traveling A&P and pay them to come out. My guess is at this point your going to need a flight permit to get to over for your annual. So you can take care of both at the same time.