I could probably come up with a dozen different things that it could be. Most likely it's a relay that's actuated remotely from the computer, although it could be some other sort of actuator, a sensor's signal conditioner, or a kludge to tape over an 'oops'.
Chris, like some other replies suggest, the module's function could be for almost anything on a late-model vehicle, as they typically have almost insane numbers of electronic circuits.
From it's appearance, my first guess would be the windshield wiper intermittent duty/delay module, which would very likely include the relay (black cube) and about a dozen-or-two components (including perhaps a 555 timer IC). For it to be the WS wiper delay module, I would expect it to require more than 3 pins for the connector, although there may be another row of pins below the 3 visible ones.
I was under the impression (at least in the UK) that there was _required_ to be an indication of when a light was out, just as the electronic flashers also have a piezo sounder to give a failsafe indication that the turn signals are operational.
So its probably a Shapeshifter Fire Control relay from a Minigun.
"[L]iberals are afraid to state what they truly believe in, for to do so would result in even less votes than they currently receive. Their methodology is to lie about their real agenda in the hopes of regaining power, at which point they will do whatever they damn well please. The problem is they have concealed and obfuscated for so long that, as a group, they themselves are no longer sure of their goals. They are a collection of wild-eyed splinter groups, all holding a grab-bag of dreams and wishes. Some want a Socialist, secular-humanist state, others the repeal of the Second Amendment. Some want same sex/different species marriage, others want voting rights for trees, fish, coal and bugs. Some want cradle to grave care and complete subservience to the government nanny state, others want a culture that walks in lockstep and speaks only with intonations of political correctness. I view the American liberals in much the same way I view the competing factions of Islamic fundamentalists. The latter hate each other to the core, and only join forces to attack the US or Israel. The former hate themselves to the core, and only join forces to attack George Bush and conservatives." --Ron Marr