Turn signals/hazards out

We recently got a 2004 Prius. During the most recent cold snap around there the turn signals and hazard lights suddenly stopped working. Looking under the hood I heard a buzzing sound, which turned out to be coming from a sort of small black "module" that had been wired into the turn signal circuit with a tangle of wires and connectors.

It seems that some previous owner had set the car up to have always on running lights. I took it to some shops around here, but no one wants to touch it because of the modification. The dealer, of course, wants crazy money just to look into it, and can't promise any results. I just want my turn signals back!

Does anyone here have any experience with this sort of mod? Anyone know how to undo it, or have access to a diagram or picture of the wiring the way it was originally? Or a diagram or wiring instructions for the "module" modification? Is it normal for the module to buzz, or is that a sign that it's broken? Help!