Dome light wont turn off.

My Ranger didn't have a dome light installed when I got it, so I picked one up at the parts yard. I installed it, connecting the green/orange wire to the non-grounded screw and it works, but it wont shut off.

I'll mention that the "door ajar" light is always on in my dash and the chime dings whenever the keys are in the ignition regardless of whether or not the doors are closed, so I figured that was the reason the domelight stays on. I disconnected the latch sensors inside the door and the "Door Ajar" light on the dash and the "key-in-ignition" chime went away, but the dome light remains on. I Already made sure that the dimmer switch is not all the way on.

there is another bare wire up behind the dome light base that is not connected to anything. It is black with a blue stripe. Anyone know what that is? The 3rd brake light works and the truck is not equipped with bed lights, so I can't figure out what that black/blue wire is for. If I connect it to the other prong ont domelight base, it immediately blows fuse #26(Battery Saver Relay, Electronic Shift Relay, Interior Lamp Relay, Power Window Relay, Electronic Shift Control Module, Dome/Map Lamp, GEM)

Here is a pic of the wires before I put the domelight base on.