rockyboy

So I just drove through HEAVY fog. I turn on the low beam headlights then turn on the fog lights. Then I turn on the high beams. I noticed that when the high beams go on, the fog lights automatically turn off. When I shut the high beams off, the fog lights come back on.

Why is that?

dirleton

That's how it's designed. Check your manual.

Puma Jim

Most brands do that including my 2012 silverado

5 Acuras

iTrader: (1)

I'm sure ceb will weigh in on this, I think its because having high beams and the fog lights on at the same time is counterproductive to the purpose of each one.

justnspace

iTrader: (1)

^exactly the reason.

Fog = moisture.
High beams reflect of the moisture in the air, leading to poor visibility during foggy conditions.

mrgold35

Usually, the OEM fog only turn on when the headlights are on. You can't use the parking lights and fogs together. I had cars in the past that would allow you to turn on the fogs+parking lights if you wanted.

ulrblitzer

<p>Read somewhere that it's a safety/legal issue. Can't have more than&nbsp;4 foward lights on at the same time. Low + fogs or high&nbsp;+ low .. use of high beams will automatically switch off the fogs. Unless you self wired or got an ebay kit like when I had my Si and had manual cotrol of the fogs regardless.</p>

Desert Ridge

High beams -- being just below your eye level -- put out light that is reflected by fog directly back into your eyes. IOW, high beams cause "blindness" in white out and fog conditions.

Fog lights work because of their placement -- low to the ground. The light from them is not reflected directly back to your eye.

Using high beams in fog cancels the need for fog lights, since you'll not be able to see anything when high beams are on.

Honda is trying to teach you a driving lesson that your father should have taught you.

rockyboy

The thing is when I turned on the high beams in heavy fog, it made visibility better. It lit up the signs and I could see the huge beams of light piercing the fog and lighting things up!

mrgold35

I wondered how the new LED would do in rain, fog, or snow conditions? Having multiple lenses might be directing the light at better angles for better driver visibility compared to the single lens HIDs.

rockyboy

Drove through heavy fog the other night. The LED lights make it easier to drive because it lights up the signs and turns things almost neon. It really pierces through the fog.

ceb

Right. I keep forgetting that the RDX is so good that it defies the laws of physics, gravity and nature.

It is posts like these that prove that you are 13 years old. Nobody can be so stupid and make it to 35.

The other posters are correct. Hi beams don't work in fog as they reflect light back at the driver.

rockyboy

I drove through heavy fog fine. The LEDs make a huge difference!

Comfy

It's difficult to get depth perception in heavy fog. What you perceive as bright light is actually lots of foreground light due to scattering by fog/moisture. Fog lights are more suited in such situations. Yes you may see reflective sign posts in fog but poorly lit objects are even more difficult to see when there is lots of foreground light. Fog lights + reduced speed are best for the situation.

ceb

Unless those lights are connected to a RDX - in which case you get superman like vision

rockyboy

I can see the beams of light going through the fog much more clearly than in cars with regular lights. I find it's most clear with low and high beams on but but don't want to cause glare for other drivers with the high beams.

ceb

You are an idiot, an imbecile and a moron all at the same time.

I'm just glad that you are in Canada and I don't have to drive on the same roads as you do.

honda_nut

What you are seeing is the individual moisture droplets illuminated by the light. It's an illusion that you are able to see more, but it is actually quite the opposite.

High beams should not be used in foggy situations period. It's in the driving learners handbook.

Also, all oem fog lights will turn off with high beams as to not create excessive glare for other drivers.

rockyboy

I turned off the high beams when other cars were around and used the low beams with fog lights. The LED lights do make the road signs and any paint on the road more visible.