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Old 12-31-2015, 06:09 PM
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fog lights go off when brites are on

The fog lights go off when brites are switched on. I know on my Harley the dealer can reprogram the computer so the spots stay on, can this be done on the Grand Cherokee Limited?

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Old 12-31-2015, 07:01 PM
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Re: fog lights go off when brites are on

Don't thing so. It is a DOD requirement I think, that the fogs go off with bright. Of course when you install your self, then you can wire them to stay on.
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Old 12-31-2015, 08:04 PM
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Re: fog lights go off when brites are on

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Originally Posted by 07C6Z06 View Post
Don't thing so. It is a DOD requirement I think, that the fogs go off with bright. Of course when you install your self, then you can wire them to stay on.

Highly Doubtful that it's a DOD requirement-unless the Department of Defense is now in the automotive business. More than likely it's the D.O.T. you were referring too?


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Old 12-31-2015, 08:12 PM
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Re: fog lights go off when brites are on

Your right, after 32 years as a DOD Automotive engineer that what you get. Have a happy new year.
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Old 01-25-2016, 08:18 AM
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Re: fog lights go off when brites are on

I had the FCM (forward control module) reprogrammed on my '05 Magnum R/T, for "euro" lighting which kept the fogs on with brites. Is this an option on the WK2?
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Old 01-27-2016, 07:24 PM
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Re: fog lights go off when brites are on

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Originally Posted by greybeard.3@att.net View Post
The fog lights go off when brites are switched on. I know on my Harley the dealer can reprogram the computer so the spots stay on, can this be done on the Grand Cherokee Limited?
Why would you want hi-beams on when it's foggy? Why would you want fog lights on when it's not? The two are not intended to be on at the same time. Or do you just get a kick out of blinding oncoming drivers?
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Old 01-27-2016, 07:56 PM
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Re: fog lights go off when brites are on

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Originally Posted by hotspur View Post
Why would you want hi-beams on when it's foggy? Why would you want fog lights on when it's not? The two are not intended to be on at the same time. Or do you just get a kick out of blinding oncoming drivers?
How would you blind oncoming drivers with fog lights? Unless of course you leave your high beams on when there is an oncoming driver. Fog lights don't blind other drivers. There is absolutely no reason whatsoever why there should be a rule or law against fog lights being on with high beams! You should only be using high beams with no other vehicles in front of you, oncoming or otherwise. Fog lights (or driving lights, for that matter) add additional foreground light that you often lose with high beams. If you're driving in the middle of nowhere, in the middle of the night, you want all the light you can get.
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Old 01-27-2016, 08:13 PM
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Re: fog lights go off when brites are on

ok, first of all, the "fog lights" on the WK2 aren't fog lights at all. They are just auxiliary lights; the beam pattern bears no resemblance to a true fog light.

In the US, FMVSS does indeed restrict what forward-facing lights can be lit.. which is why the 'fogs' on US-compliant vehicles are killed when the high beams are turned on.

That said, given my experience on my long, rural pre-dawn morning commute once a week, I'm pretty sure that most people think the blue headlight icon in their instrument cluster means "your cool headlights are on" ..

So might as well light 'em if you got 'em, I guess..
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Old 02-04-2016, 08:31 AM
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Re: fog lights go off when brites are on

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Originally Posted by DriverDave View Post
How would you blind oncoming drivers with fog lights? Unless of course you leave your high beams on when there is an oncoming driver. Fog lights don't blind other drivers. There is absolutely no reason whatsoever why there should be a rule or law against fog lights being on with high beams! You should only be using high beams with no other vehicles in front of you, oncoming or otherwise. Fog lights (or driving lights, for that matter) add additional foreground light that you often lose with high beams. If you're driving in the middle of nowhere, in the middle of the night, you want all the light you can get.
Agreed.

I know other than the DOT having a law controlling this, the other common reason is that when you have your high beams on, you're generally travelling pretty fast and need to see way ahead of you. Having the fog lights on lights up the road directly in front of the vehicle and hurts your long distance vision.

But yeah, I say when I have my high beams on, I want all the light I can get. My '07 BMW allowed the fogs to stay on with the high beams without modification.
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Old 02-07-2016, 09:05 PM
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Re: fog lights go off when brites are on

I know the dealer can reprogram them for the newer rams, so im sure they can on these. My "fogs" tend to light up the ditches quite nicely where the deer like to hang out. I'd like this feature. Our 14 has over 53k miles on it and a good chunk of that is 2 lane back roads at dusk. With 1 deer hit already. I'll take anything i can get.
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Old 02-08-2016, 10:02 AM
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Re: fog lights go off when brites are on

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Originally Posted by Nicks_2014 View Post
I know the dealer can reprogram them for the newer rams, so im sure they can on these. My "fogs" tend to light up the ditches quite nicely where the deer like to hang out. I'd like this feature. Our 14 has over 53k miles on it and a good chunk of that is 2 lane back roads at dusk. With 1 deer hit already. I'll take anything i can get.
I also drive a lot on country roads and it would be nice if the fog lights stayed on with the high beams. I am going to stop by my Jeep dealer and see if they have any ability to reprogram them on my 14 Overland. Al
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Old 02-08-2016, 11:10 AM
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Re: fog lights go off when brites are on

Id like this also, the more light the better on the backroads
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