Alright so I bought a overlay for my 1999 ford expedition 5.4 xlt and well I got everything put together, now my problem is the wiring, it has a red cable and a black cable with a red stripe 
? I read about that the power cable needs to be connected to one of the wires from the headlamp switch, I have no idea which one, supposably it belongs on the light blue wire with the red stripe, since that's the illumination. In all I tried several ways to connect it but I was never able to get it to light up at all, any help is truely appreaciated.
F.Y.I
There the ones from eBay going for around 20 bucks
? I read about that the power cable needs to be connected to one of the wires from the headlamp switch, I have no idea which one, supposably it belongs on the light blue wire with the red stripe, since that's the illumination. In all I tried several ways to connect it but I was never able to get it to light up at all, any help is truely appreaciated.F.Y.I
There the ones from eBay going for around 20 bucks
