Most cars have a master electrical control box (sometimes computerized) It might be worth the time to focus on that is all other connections seem to be good and you have tested the circuits for continuity.
Bulbs? Fuses? Relay? Dimmer switch? Headlight switch?
Get a new headlight switch even check your bulbs might help
either a blown fuse or bad headlight switch
you probably would first start out with replacing the headlight bulbs then work to the dimmer switch and electrical system from there you probably would first start out with replacing the headlight bulbs then work to the dimmer switch and electrical system from there
the newer bulbs that replace the older ones draw more power and overheat the headlight switch. buy a new headlight switch and try that, it worked on my 67.
The headlights are a separate circuit from the others. Check the bulbs, headlight switch, Hi/Low beam switch and depending what year you have check the fuses.
The VW polo has headlight bulbs. If the headlights are not working, it may be a bulb has burnt out.
Bulbs burnt out? Bad hi-low beam switch? Voltage spike?
Dipped headlights usually refers to your low beam headlight. If you're talking about light bulbs, then yes, some manufacturers use headlight bulbs which are also being used for fog lights. However, externally, dipped headlights are your low beam headlight.
The headlight switch on a 1993 Mercury Topaz is typically located on the dashboard to the left of the steering wheel. It allows you to turn the headlights on and off, as well as control other exterior lights such as the parking lights and fog lights. If you are experiencing issues with your headlights, it is recommended to check the fuse, bulbs, and wiring before replacing the headlight switch.
Check bulbs Check fuses Bad light switch? Bad voltage regulator causing alternator to spike blowing out bulbs? Headlight circuit breaker? Headlight relay?
check the fuses, bulbs, relays, headlight switch, and the multi function switch in steering column. also check to see if you have lost the ground to the bulb sockets.