Prius (2010-12) :: Dash Readout Turns Off When Turn The Headlights On
Sep 13, 2012
We have noticed something strange with the dash in our new 2012 Prius. While driving at dusk and turning the headlights on the dash readout can go completely dark. Leaving only the gear selection indicator visible. This can be completely disorienting and dangerous. This happens if the dimmer wheel is set in the lowest position. It will turn back on if the dimmer wheel is moved up from the lowest setting.
I can recreate the issue parked by simply having the headlights on and dimming the switch all the way down. It will shut off the speedometer, MPGmeter, and Hyrbrid indicator screens.
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My dashboard light used to dim when I turned my headlights on (normal behavior). Now they go off altogether. Dangerous, n'est-ce pas? Is it a known issue with, for example, a fuse or relay?
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I am interested in having an MPG readout on my back bumper, maybe next to the tag. Nothing large and in your face, but something someone might notice as they cruised along behind or next to me. So that might even mean dynamic brightness to prevent people from being blinded at night, or it being a distraction.
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When I turn on the headlights of my 2010 the dash backlight dims considerably. It becomes difficult to see/read when the sun hits it just right...especially wearing polarized sunglasses. I have the dimmer switch set all the way high. Is there a way to increase the backlighting or have it not dim as much with the headlights on?
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Just installed DDM HID 35w 5000K. But strange issue. If I turn on HID first before start the car, one side turns off by itself in few seconds every single time. However, HID (both sides) stay on fine everytime (so far ) if I start the car first then turn headlight on. Could it be bad ballast or else?
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My outside temp readout seems to be stuck at 61-64 degrees and that won't allow the auto select to come on if I have it set at say 72 degrees. It has been working really great up till about a week ago.
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I just got my 2010 prius with OEM fog lights. I was wondering if there's a mod that I can just turn on my fogs without having to also turn on the headlights.
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Just got a 2014 Prius Three. All my precious cars (non-Prius) had an automatic on headlight system, noticed the Prius doesn't. Can I just replace the turn signal lever with one that has the 'auto' feature? Could it possibly be that simple?
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My car makes a funny sound (like an audio cassette being rewound in the area above the radio in the dash) when I start it, and the sound only stops when I turn the headlights on.
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I seem to have a problem with my jetta. It's the 1.8t. When I turn the turn signal on, I can see the dash and headlights dim. Also when I tried putting both windows up at the same time, the car seemed to short out and almost shut off. It reset the time and trip mileage when it did so.
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I put some LED lights in my front side markers in my headlights...The issue is they turn on then off and cause a light out warning in the dash. What do I need to do to have these work all the time?
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I have a 1990 aerostar 4.0 eddie bauer. I cant figure it out but when I turn the head lights on the dash lights go out. with the head lights turned off, the dash lights work just fine. I have changed the headlight switch, and the panel dimmer switch.
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When I'm in a garage and start the car, with the headlights on 'AUTO', they go on immediately, even before the engine turns on and starts running. Is this bad for the wiring in any way?
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I have a weird problem with my 2006 with HID headlights and 78k miles. When I turn on the headlights, the reverse camera turns on & so do the back-up white lights. I can clear the reverse camera by pushing any button, but the back-up lights are a big problem. No codes are being seen via ODB, everything else works great, and no fuses appear to be blown.
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Until about a week ago, when I turned my headlights on, the icon (light bulb) appeared on the dash. Out of the blue, it doesn't. Any clue why? (High beam icon still appears).
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We've only had the car for a week but I'm puzzled by what I'm seeing for the mpg on the screen. At no time has the screen indicated an average mpg of outside the range of 44.7 to 45.0 mpg. This is despite filling it up, resetting the trip meters and immediately heading up the Cajon Pass twice while the instant fuel economy indicated 25 mpg or less. I understand the inconsistency of calculating at the pump because of the bladder but doing that has worked out to 2 fills in the high 30s, one in the high 40s and one of 53 mpg. Yet the car still reads 44.7 to 45.0.
It's not a big thing because I don't depend on it; I tend to fill the car when it goes below 1/2 full and over time I will have enough pump calculations to give me a fairly accurate depiction of my average mpg.
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How accurate is the mpg readout on that display screen on the Prius. How is it measured.
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This afternoon, when my wife went to start my 2001 prius, it was dead. I disconnected the 12V battery (relatively new) and checked the voltage. About 3 volts. So I put a charger on it and hoped. After about 12 hours it seemed to have enough charge to try it, and immediately the headlights turned on. I jumped in the car to turn off the headlights but they wouldn't turn off. I honestly don't know if the switch was in the on position to start with, but it's definitely in the off position now, and the lights are still on. What's going on here?
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2004 Prius. Sometimes, quite randomly, the headlights will turn off. Sometimes its both, sometimes its the left only, and sometimes its the right only. This affects both main and high beams. The dash lights and tail lights may still be on (panicking doesn't give me time to confirm that), but for sure the Nav panel is still lit.
The first time this happened was when I was driving on a mountain road at night in the rain. It now happens almost every night and I have confirmed that it also happens in daytime. Road conditions (bumpy/smooth, wet/dry, dark/well lit) do not seem to be a factor.
At least once while still in my garage, when I started the car the left light was out. I can get the lights to turn back on by turning them off all the way and then back on. Nothing else works. I have replaced the relay for the lights - that didn't change anything.
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How do I turn my dash lights COMPLETELY off? I do a lot of night driving and have learned to live with the dimmer all the way down, though my personal preference is to have it just a little dimmer. My commute makes traffic unpredictable, so I often get to work early (better than too late!), so I like to nap a little in the car until time to drag myself in to the office. When my headlights are off and I'm parked, the dash lights are WAY bright. Is there a way to turn them off, and also have the headlights off too? I need the headlights off (and the silly parking lights that stay on till you set the parking brake). So, simply stated, is there a way to turn everything all the way off while the engine (and heater) stay running?
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Anytime I turn the headlights on, the high beams go on too; I cannot switch off the high beams unless I turn off the headlights entirely (I have been driving with the low beams on during the day for the 5 years I have had the car)
I can find no reason for this; I'm inspecting the fuses (with little expectation). The only thing I can think of is the control switch or wiring. I have standard headlamps, not hid.
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