I'm not 100% sure becasue your headlamp assembly is slightly differnet from mine, but you should be able to disconnect it fairly easily.

The trick is to make sure you're grabbing it in the correct spot. You want to try to seperate the plastic bulb housing from the harness, not the glass from the plastic.

Take a look at this replacement bulb and you should see what I mean. The wiring harness plugs into the bottom of this piece at the bottom of the picture below the blue gasket (at the very bottom of the picture).

http://www.partsamerica.com/product_...31829_bulb.jpg

Let me know how it goes.