Lights go out when Highbeams turned on

Noticed the other night on the way home. Went to use my highbeams and I lost my headlights. Back to low beams and they work fine. I had the headlights out when I swapped header panels. Any way I could have plugged them in wrong or something? Its a 2000 Xj

Well, did you check to see if BOTH high beam filaments are burnt out--it happens.

They worked before I pulled it apart. But Ill check. I was fixing damage from an impact with a tree.

Dang jaywalking trees!

Seriously, you have a three prong connector, high, low, ground. As the low beams work then you have grounds, so you need to check the filaments and also check for power on high beam.

- Make sure you have power to the high beam terminii in the sockets when you have full beams selected.

YES - Replace both bulbs. As mentioned, it can happen that you lose both at once. And, since you're reporting recent work in the area and recent blunt-force trauma, it becomes even more likely (full beam filaments tend to be thinner than those for dip beam, which makes them more fragile.)

NO - Wiring fault in between socket and multi-function switch, or defent in MFS. Inspect and replace PRN.

"Worked When Pulled," in this case, isn't necessarily an indicator of what's going on. Test at least fairly thoroughly.

Figured id start with the connections. Cleaned them up, and they work just like new.

arty: