The electrical system is the most complex system in the whole vehicle now that carburetors are not used. Due to the complexity it requires more time to diagnose an issue like one of these. We have a three hour minimum of $270 when diagnosing electrical problems and often that is all we need to find the problem. Of course if it is simply a loose battery terminal, blown Fuse, exceptions will be made.
Electrical problems can be the worst! From blown fuses to bad wiring electrical problems are the hardest to diagnose. Because of this you have to have a lot of tools, and even more special tools to find the problem.