It sounds like you definitely have a short. Get an ohm meter and probe the power wire to each light. One of them should register continuity to ground. This will give you a starting point for where to start looking at the harness.
SOURCE: no high-beam headlights
It may not be the switch; most hi-lo changes are via relay to prevent the higher currents from flowing through light-duty switches.
Locate the relay cluster (it might be near or with the fuses) and if they aren't marked, pull wach one of them and plug back in several times to wipe possible corrosion from the blade contacts.
If they are marked, look to see if the same relay is used elsewhere (part number should be visible) and swap them temporarily to see if the relay is at fault.
Some vehicles will use separate relays for hi-lo beams and another for flashing since that often turns on both beams momentarily.
SOURCE: 1997 Hyundai Accent is acting funny in the
There's only one relay, but two fuses, both located in the underhood fuse/relay box.
Sounds like you have a wiring problem since sometime the left works and the right doesn't, then the right works then the left doesn't. Might be the multi-function switch on the steering column in combination with the connector M10-1, EM01, SE14 & 16.
SOURCE: I need to change the low beam headlight bulb
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