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Why do my gauges fog up at night?
#1

This is rather perplexing to me. The gauges in my pillar pod used to fog up when you first turned the lights on and it would gradually go away, and I always figured that some water was getting around the weatherstripping and into the gauges somehow and then when the light bulb heated it up, it fogged up. Well, tonight I had the lights on in the car for the first time since I put the gauges in my center console, and my oil pressure and volts gauges both fogged up...but the oil temp gauge was fine :headscratch: What the frick is the deal with this?
ABS to Vac-assisted brakes conversion
2005 Mustang GT-cams, intake, longtubes, lowered, Brembo swap
2016 F150 5.0 Sport
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#2

rain-x anti fog. my 66 stang does this when it rains b/c water leaks inside and i ue the vent to try and remove the moisture from the window it fogs up. i belive it is just moisture. i cant see what the lights have todo with it except warm the gauges and get rid of the moisture. body heat has a factor to. and breathing on them as well
88 turbo coupe
66 mustang
68 fairlane
79 F150
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#3

They fog up on the inside though, how could I use the rain-x stuff?

Also my windshield leaks pretty bad in a couple spots and it's cracked, I'm gonna get it replaced hopefully next week...
ABS to Vac-assisted brakes conversion
2005 Mustang GT-cams, intake, longtubes, lowered, Brembo swap
2016 F150 5.0 Sport
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#4

moisture from the cracked windshield has probably gotten inside the gauge cluster housing man and is just sitting in the bottom back of the housing. water goes where it wants to.
86 svo 1D (sold)
Volvo engine on engine stand since 2004 lol
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#5

I have 6 autometer gauges in my XR and only the fuel pressure gauge fogs up. It had to be the most expensive one. It's been doing this for over a year and only with the lights on. I wish there was a fix because not only is it annoying but I am worried the moisture could damage the gauge itself.
1987 xr4ti. TC intercooler with early fox hood scoop for airflow. Gillis valve 19 PSI. Conical filter in inner fender.LA3 processor. Full 3" exhaust.
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#6

Seal up the back of the gauge. Most guages have openings for the fitting, and bulb. Lots of air and moisture can get in even with the bulb in it, so try and seal it up. Maybe hot glue even, its easy to rip off later.
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#7

My water temp gauge does this also but I have no leaks.Mine may be from slight moisture in the heater box.My fuel pressure guage is outside and never fogs up.Weird.
84TC-gutted intakes-80mm maf-944 FMIC Greddy BOV 72lb inj
PPbig valve head-255LPH kirban-20psi-17"cntlines-65mmTB full 3" exhaust-on the way to 400hp
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#8

Quote:Originally posted by karnage:
My water temp gauge does this also but I have no leaks.Mine may be from slight moisture in the heater box.My fuel pressure guage is outside and never fogs up.Weird.
that b/c the inside of the gauge is the same tmep as the outside air. it fogs up b/c it either gets warmer or colder.
88 turbo coupe
66 mustang
68 fairlane
79 F150
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#9

Well, tonight I drove home and the gauges never fogged up. Who knows...
ABS to Vac-assisted brakes conversion
2005 Mustang GT-cams, intake, longtubes, lowered, Brembo swap
2016 F150 5.0 Sport
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#10

My gauges look foggy sometimes when I have been overserved adult beverages! Usually in the AM.
1984 GT350, RR Cam, 12* BTDC, 2-1/2" Exhaust, 14 psi Boost, SVO I/C, Gillis Type BC, NO KS, K&N Cone
"Burning Rubber w/2.3 Turbo"
2003 Excur V-10 Mrs ride
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