I recently added subs to my car and wired in a power line directly to the battery. I have not modified or touched any of the fuses or wires related to the headlights. They are operating fine and the control switch works great, however the headlights are staying on all the time even during sunny conditions. I can turn the headlight control to the off position then cover the ambient light sensor and they come on just fine. However, when in the on position they don't seem to ever shut off. Any ideas as to why this is happening?