2003 toyota rav 4 dash lights blink till u turn on headlights

Do you have the dash light dimmer control turned down by chance?

This Toyota Rav-4 1998 to 2000 - Radio Installation / Stereo Installation coudl helped: InstallDocs/Toyota/PDF/869029.pdf

Good luck.

If your mechanic is telling it's ok, as long as it's not blinking, then you need to find another mechanic that knows how to fix it and not guess, when the computer first picks up a bad signal from a sensor, it will blink the code number, after that it will store it and the light will stay on, till it's fix, there's a code stored in the computer, go to any auto parts or Autozone, where they will pull code's from your computer for free, but don't buy any thing till you have it checked out first, you are more then welcome to get back with us with the trouble code number, and we will help you diag. your trouble code.

Possibly your lights are on timer, or an auto dim, or auto lamp function.

sounds like there is a broken wire. the only advise i can give you is to follow the hot wire for that light untill you find the break in the wire.

Sounds like the Orange engine light is on? If yes, the 07 Rav 4 is a great car but suffers greatly with Lambda faults. You need the code read to be sure plus there are 4 lambda's on your car.

If it is a Red triangle light staying on then it could be low brake fluid level.

sounds like an alarm system that has the horn disconnected,so when you start the vehicle it trips the alarm then resets itself after awhile .see if there is an aftermarket Alarm system under the dash and remove it!

sounds like either a wiring loom is shorting across somewhere ??where ----best of british to finding it

Headlamp doors are vacuum operated. Chk for a vacuum leak.

Under the dash, under the glove box.