loose battery connection, or dead battery.
turn on your headlights
Turn on headlights/parking lights and adjust dimmer control
Probably a fuse
Brake lights and turn signals are on a separate circuit from the tail lights. Tail lights are on the same circuit with the dashboard lights. If the dashboard lights aren't working either, check the fuse. If they ARE working, check the headlight switch.
The "trip odometer" on the dashboard doubles as a dimmer. So, the solution to no lights inside the Toyota Sienna is to turn the trip odometer up to turn the lights back on.
I've researched this on the Internet and apparently the trip odometer button also serves as the dimmer for the dashboard lights. If you turn it (anti)-clockwise, your dash lights should come on. Its mentioned obscurely in the manual.
Turn the stem for the odometer reset
Turn on the dashboard lights, and start removing the fuses one by one. When the dashboard light turned off, that is the good fuse. If the dashboard fuse is burnt, start replacing the fuses one by one, and when the dashboard will light up that is the place of the burnt fuse.
Because it is British.
If the other lights are turning on, you probably have a burned out bulb or a bad connection.
You will need to look up by the dashboard. It is most likely that they will be located there are near the button to turn on the headlights.
You turn the clock adjustment knob without pulling it. TO adjust the time you pull the knob and turn, to adjust dash lights you just turn knob.