My friend's 2002 Acura TL Type S has the right lowbeam headlight out. Tried replacing the bulb first. It was $90. Didn't fix it. Checked the fuses in the under hood relay box, they were ok. Swapped out the relays in the same box, but no change. Checked for voltage at the headlight receptacle and I have no power. I can't figure it out. Need some ideas...