Hey can someone help me?, I changed my headunit because the stock one wasnt working and then i notice the running tail lights werent working but when i touch the brakes it works, i checked the fuses and the all seem good, i notice on the harness i bought while replacing the headunit it had two orange wire for the illumination but there arent no wire for my deck to connect them..could that be the issue ?

 

You blown a fuse. That fuse is located in the fuse block behind the battery, it's a 10amp. The illumination wire has nothing to do with your taillights it's just to dim your head unit screen at night