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Old 16-01-2013   #1
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tail lights misting up.

Bought a.2 year old punto evo in December, only covered 16000 miles & can't fault it, only the rear lights mist up, is there a fix for this? Got a 3rd year dealer warranty but guess what, tail lights ate not covered on this & fiat tell me they all do it. Any help is welcome.
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Old 16-01-2013   #2
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Re: tail lights misting up.

Remove them and dry them out and then replacing ensuring seals are sitting correctly.
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Old 16-01-2013   #3
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Re: tail lights misting up.

Quote Originally Posted by Most Easterly Pandas View Post
Remove them and dry them out and then replacing ensuring seals are sitting correctly.
Wont work as there is a hole on the outer lens, therefore it will just mist up again.
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Old 16-01-2013   #4
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Re: tail lights misting up.

Well it's normal then.
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Old 17-01-2013   #5
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Re: tail lights misting up.

I'll remove them &have a look. These are the lexus looking lights. Where abouts is the hole located on the outer lenses, cheers.
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Old 17-01-2013   #6
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Re: tail lights misting up.

Lexus looking lights? So not standard? Piccys?

Me and MEP thought you were on about the standard fit ones. But the hole is near enough dead center on the light unit if it is a Punto Evo that you have.
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Old 17-01-2013   #7
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Re: tail lights misting up.

I have the orignal Punto 2012 tail lights (they are the same as the evo) and in some conditions, have a bit of mist inside.
But it disapear rapidly.

Conditions include when the sun hit a part of the light, and not the whole piece. In this case, mist can be see inside.

If this is small, don't worry
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Old 17-01-2013   #8
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Re: tail lights misting up.

Plastic lamps with large sections of internal lighting create heat, this heat has to be vented, hence the holes, in certain conditions when the lamps are switched off, as the lamp cools, the hot air in the lamp draws air back inside the lamp, if the air is damp then moist air enters the lamp causing misting. Its physics.
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Old 17-01-2013   #9
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Re: tail lights misting up.

The problem with the 2012/evo tail lights is the "navigation light" (please tell me how you call this in english) are in LED, and LED generate quite no heat.

Only brake and turn signal lights are classical bulbs, and they are on briefly... So not a lot of heat to heat up the light and evacuate mist....
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Old 17-01-2013   #10
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Re: tail lights misting up.

Quote Originally Posted by Mkala View Post
"navigation light" (please tell me how you call this in english)
Tail / Possition light
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Old 18-01-2013   #11
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Quote Originally Posted by scoop987 View Post
Lexus looking lights? So not standard? Piccys?

Me and MEP thought you were on about the standard fit ones. But the hole is near enough dead center on the light unit if it is a Punto Evo that you have.
They are standard. They have the LED lights down the side, sorry if I miss led you, they are just different from my neighbors punto which is same year but different model. :-D
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Old 18-01-2013   #12
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Re: tail lights misting up.

cheers guys, I think I was worrying over nothing. Seems to be very common by what I've been told. Panic over.:-D
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Old 18-01-2013   #13
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Re: tail lights misting up.

Quote Originally Posted by Most Easterly Pandas View Post
Tail / Possition light
Thank you, learned a new term

Quote Originally Posted by woody78 View Post
They are standard. They have the LED lights down the side, sorry if I miss led you, they are just different from my neighbors punto which is same year but different model. :-D
Yes, you right, the Grande Punto has "non crystal" standard lights with bulbs. Evo and Punto 2012 have "crystal" style with mix of led / bulbs

Quote Originally Posted by woody78 View Post
cheers guys, I think I was worrying over nothing. Seems to be very common by what I've been told. Panic over.:-D
If it is just a few and not always present, no problem.. if you are not sure post a pic
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Old 18-01-2013   #14
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Re: tail lights misting up.

Quote Originally Posted by woody78 View Post
I'll remove them &have a look. These are the lexus looking lights. Where abouts is the hole located on the outer lenses, cheers.
What holes?

mine dont have any holes?


the moisture is most likely to get in via the cable duct from the car warm moist air from the cabin can enter the lamps

notice the clear patch between the brake light and the indicator after a reasonable drive?
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Old 20-01-2013   #15
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Re: tail lights misting up.

well a day off work and i decided to de mist mine anyhow,,,,


no holes in my lenses but back of the lamp....

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cover off

as you can see with the cover off that duct where it plugs in can carry warm moist air from the cabin directly in to the lamp units

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the damp can cause other issues cant see any other reason for this:

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spent a good hour removing flecks of orange varnish from inside the lights using cotton wool buds on copper wire.... and compressed air
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still it wont happen again peel free Osram Diadem bulbs fitted

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What Goes Up Must Come Down.....

Quote Originally Posted by Most Easterly Pandas View Post
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Quote Originally Posted by EmmaM88 View Post
Just a little touch up

Last edited by Andy Monty; 20-01-2013 at 18:31.
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