While driving at night, the activation of turn signal intermittently shuts off headlights. to re-energize headlights i have to manually switch the headlight switch from auto to on. this is very disturbing and dangerous while driving at night in rural areas. i am hoping someone addresses this with toyota, since if they can't replicate the issue they send you home!
If the headlights are set to auto and i signal a left turn and turn to the left, the headlights shut off and the interior lights switch to "day mode". the issue seems intermittent. it seems to occur in cooler temps (<50f).
When engaging turn signal, all lights extinguish momenatarily. this is an intermitten and happens at random, but not constant. the first time i noticed was early morning before sun rise i was in a turning lane at a red light stopped, engaged left turn signal and all lights went dark. the next time i was attempting to merge and engaged turn signal in traffic all lights went dark. i searched the internet forums to find this is a common occurence with tundra platinum and 1794 models. my vehicle has no modifications and all lighting is factory installed.
All lights (headlamps and tail lamps and instrument panel) turn off when using turn signal. this typically happens when changing lanes at highway speed. i am not the only one experiencing this problem. seems to occur in 2015-2017 toyota tundras (1794 & platinum editions). see thread. https://www.tundras.com/threads/auto-headlights-shut-off-with-turn-signal.22968/page-3
I have a serious safety concern regarding the lack of daytime vehicle instrument illumination on my new 2016 toyota tundra (while driving, stationary and on all roads) during the day. as an elder adult who wears sunglasses to protect their eyes (on the recommendation of the medical profession) the dash board (specifically the speedometer indicator) is barely discernible. even without sunglasses the instrument panel is very dark. i am sure there are thousands of others who would like to see the instruments and operate their vehicles in a safe and lawful manner during the daytime or with sunglasses on. i am sure the decision, by toyota, to not illuminate the dash in the daytime saves a few pennies and adds up for the manufacturer when you sell thousands of vehicles? but. . . not being able to see a dark instrument panel is bound to cause more than a few accidents.
While driving at night time, the whole lighting include headlight and inside light like odometer screen, navigation screen completely black out for few second sometime near a minnute. its only happen when the blinkers its used.
Bought new 2016 tundra limited 11/16/2015 and noticed that dash lights do not come on during daylight hours unless parking lights or headlights are on. in the off/drl position or the auto position no dash lights. when i called toyota help line i was told that this change was made because if the driver can see the outline of the numbers on the gauges they do not need to be illuminated. he could not offer any reason for changing this standard feature. other than not seeing the gauges sharper and clearer one safety defect is present. the tundra has gauges instead of warning lights for engine operations and they are smaller than the speedometer/tachometer . the temp gauge is located on the lower left of the dash and cannot be seen clearly without the dash illuminated because that corner is dark if it is cloudy or early or late . if the engine overheats one would not see that problem on the gauge which might lead to engine failure ,etc. i have never owned a vehicle that required turning on the parking lights or headlights to illuminate the dash..dealer says that switch cannot be customized. toyota should issue a fix for this mistake.