gillyallan Posted February 19, 2015 Share Posted February 19, 2015 Is there a couple of sensors for the auto lights? My reason and wonder if you've noticed...... Driving along on auto and lights are on. I then drive into small tunnel and notice the green dash light dims, and on coming back out it brightening up again. Like it wanted to turn lights on then off but they were already on and some other sensor was over ruling it. Quote Link to comment Share on other sites More sharing options...
StevenST13 Posted February 19, 2015 Share Posted February 19, 2015 Only thing I can think it could be is that it's the instrument panel dimming. Some cars I've know of have an auto dim function as well so the darker it is the more the instrument panel dims to compensate so you can see the road better. I may be way off the mark but that's what it could be. 2 Quote Link to comment Share on other sites More sharing options...
Rogue2 Posted February 19, 2015 Share Posted February 19, 2015 The instrument panel light dims when you put your lights on (same as the drl's do). Quote Link to comment Share on other sites More sharing options...
gillyallan Posted February 19, 2015 Author Share Posted February 19, 2015 Ahh yeah good point 1 Quote Link to comment Share on other sites More sharing options...
KenP Posted February 19, 2015 Share Posted February 19, 2015 The instrument panel dims based on the light level, so even if the lights are on you may see the instruments dim when you go into a tunnel Quote Link to comment Share on other sites More sharing options...
E5GDM Posted February 20, 2015 Share Posted February 20, 2015 The instrument panel dims based on the light level, so even if the lights are on you may see the instruments dim when you go into a tunnel As far as I knew fiestas had a switch you manually adjusted for the instrument & dash light level. Quote Link to comment Share on other sites More sharing options...
MONDEO TXS 2.2 Posted February 20, 2015 Share Posted February 20, 2015 Depends on the spec' 1 Quote Link to comment Share on other sites More sharing options...
Big Keith Posted February 20, 2015 Share Posted February 20, 2015 I had this on one of my previous fiestas 11 plate Titanium the green light would for some reason keep changing from bright to dim on the dashboard at random times I thought it was abnormal never done anything about it. It did concern me at times whether the auto lights were actually turning on and off as a result of this . I'm almost certain this is a small fault as I've had Titanium 13 plate and now have Titanium X 64 plate without this problem Quote Link to comment Share on other sites More sharing options...
Mariner Posted February 20, 2015 Share Posted February 20, 2015 My current Titanium dash lights do dim according to exterior light level.The headlight (green) light is most noticeable. Its not a fault its by design. This did not happen on my previous 2009 Titanium. Quote Link to comment Share on other sites More sharing options...
gillyallan Posted February 20, 2015 Author Share Posted February 20, 2015 These cars are so complex and electronically controlled that nobody really knows everything about them....even ford dealers it seems. Quote Link to comment Share on other sites More sharing options...
Big Keith Posted February 20, 2015 Share Posted February 20, 2015 Definitely no dimming on my new car the only way I can dim is with the switch which turns the fogs on.my green headlight indicator stays constant bright green 100% of the time in all conditions. Sent from my iPad using Ford OC Quote Link to comment Share on other sites More sharing options...
KenP Posted February 20, 2015 Share Posted February 20, 2015 Definitely no dimming on my new car the only way I can dim is with the switch which turns the fogs on.my green headlight indicator stays constant bright green 100% of the time in all conditions. Sent from my iPad using Ford OC There is a light sensor to do this, if you have the lights on and you go from bright light to a tunnel you should see the instrument panel dim, if it doesn't it isn't working properly. Older cars just dimmed them slightly when you turned the outside lights on. The idea behind this is so you don't have to constantly adjust the instrument brightness with the dimmer. Quote Link to comment Share on other sites More sharing options...
Big Keith Posted February 20, 2015 Share Posted February 20, 2015 The problem I had on my old 11 plate titanium was it would do it randomly even at night sometimes. It definitely was some kind of fault within a short distance it could dim several times out on an open road, I was soon to replace the car as I only keep them around 18 months to 2 years so I didn't bother getting it looked at Sent from my iPad using Ford OC Quote Link to comment Share on other sites More sharing options...
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