I don't have high beams. The dash mounted high beam indicator red light works. Low beam works. The switch is new.
The high beam and high beam indicator utilize a gray wire. Somewhere along the way the wire splits. One part goes to the indicator and the other goes out to the headlights. So, my guess is that the problem lies somewhere from the split out to the headlights. Gee, the wires are only 63 years old!
The other hairball thought is that I've lost high beam in both lamps. Could happen, I suppose, but it's a stretch.