pwsusi

Fiber optics aren't working for my high beams. All others seem to work. Is there a good way to diagnose the problem? Maybe a split in the line, or is there a way to clean the tip where it attaches to the light?

TimAT

Start at the bulb. Make sure the foam seal between the headlight connector and the bulb is in place and the end is clean, along with the tit on the back of the bulb is also clear and clean.
You can shine a bright light into the end of the connector and see if it shows at the indicator. If not, then its just tracking down where it's broken or leaking.