If they are related -- and they could be -- then it's something causing an electrical short such as Mr. CW4 experienced.
Two things are true:
First, this is a serious problem which you should definitely figure out because it's probably a wire with frayed insulation which could short out at any time due to simple road vibrations. Aside from causing a stall at the most inconvenient time, it could also cause a fire. And if it's a circuit that's energized even when the ignition is off, that fire could ignite at any time, even when you're nowhere near the car, even if the car is in the garage such that the fire might spread to your whole house!
Second, you probably also have one or more of 1) a weak (and going to fail soon) alternator/generator, 2) a weak (and going to fail soon) battery, 3) a malfunctioning or failing regulator, and/or 4) a very wrong fuse in the circuit in question. 1-3 are likely to cause you problems in the near future and 4 just makes the fire hazard mentioned above that much greater.