Dimmer switch is possibly defective
Use your high-beam headlights at night whenever it is legal and safe.
High beam headlights reveal objects at a distance of at least 450 feet away. High beam headlights allow the driver to view obstacles in the road much sooner than low beam headlights.
Use your high-beam headlights at night whenever it is legal and safe.
are my low beams supposed be come on also when my high beams are on in my 1994 gmc sierra
At night yes, but in the day no because the sunlight overpowers the headlights and high beam lights.
No, you should not use high-beam headlights at all in heavy fog.
It sounds like the low beam/high beam switch is bad. Fuses are not the problem since they are built into the headlight switch and would cause headlights to blink or not come on for both high and low beam headlights.
Car headlights have to be able to "dip" so as not to dazzle oncoming traffic, they therefore can switch between a "high" beam and a "dipped" beam and thus have a dual beam.
I was looking at the 1996 Mercury Grand Marquis Owner Guide and it shows that you can change each of the ( 4 light bulbs for the 2 low beam and the 2 high beam headlights ) ( the low beam headlights take bulb # 9006 ) ( the high beam headlights take bulb # 9005 )
i have a 96 olds achieva and my high beam light was flashing, i checked the headlights and one of my low beam headlights was out. once replaced the flashing stopped.
100
Check fuses and bulps.