Flickering lights lights are flickering

usually a bad connection, loose wires or could be switch
https://www.youtube.com/watch?v=O6JL7ZTkSmc
https://www.youtube.com/watch?v=7CYXy-CJ-f0
The guy in the video below changed switch and lights still flickered. He said while switched was unplugged he cranked his car and lights came on and did not flicker but when he plugged the switch in they flickered. He took new switch back to dealer got another new switched and lights worked. You might unplug switch, crank car see if lights stop flickering.
https://www.youtube.com/watch?v=fGmmrHYMLHY

I wonder if all the lights flicker?

Some headlight bulbs aren't held into the reflectors as securely as others and can appear to flicker due to vibration, bumps and so forth. In this case the other lights will not flicker. A similar effect can happen when the bulb connections aren't positive.

If all the lights flicker it must be the voltage that is fluctuating due to poor wiring connections or a fluctuating charge rate/alternator performance.

If all the lights are flickering. I would suggest that you only go as far as locating the fuse. Clean it and put back. Alternatively replace with new fuse. It's unusual for all lights to flicker. 1 might flicker, indicating a faulty bulb. On Toyotas, the dash lights are usually on the same fuse as the park lamps.

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Apr 22, 2013 - 20 posts - ‎4 authors

check ground locations in harness under hood ,make sure they are tight

I assume you mean your signal lights when you say flicker lights? Your problem could either be a bad flasher unit or bad bulbs. I'd put my money on the flasher unit since none of the bulbs are flashing.

Short in battery cell or bad connections or the alternator is going bad. Have it fixed before you fry the computers in your car.

If the light is flickering and not just becoming brighter or dimmer with engine rpm, I'd suspect an electrical short, possibly between the battery and alternator or inside the alternator itself. have the alternator output checked before going further with diagnosis and before it fails completely and becomes more difficult to diagnose.

it sounds like the voltage regulator is faulty.........it is integrated into your altenator so you will want to have your charging system checked
hope this helps!

posabilatey a bad earth