2004 Sienna where is fuse located for parking/night running light

If that fuse was blown then you wouldn't have a left rear park lamp either. The license plate lights feed from the same fuse as the left rear park light lamp. Either way the fuse is LR Park fuse #14 and is a 10 amp located in the rear fuse block under the rear seat.

If that fuse tests good and you still don't have power at the license plate light sockets, there are two connections in-line to the sockets that may be unplugged or you just may have an outright open in the circuit. You sure the ground is good?

Depends on which specific lights you are referring too ..parking lights or brake lights? If parking lights then are the front ones working? If they are then it's not thefuse as they are all on the same circuit

check stop lamps is working. if its not working check stop fuse on fuse box located under the dashboard.

I think your problem locating the fuse may be because Ford refers to the lights you are describing as "PARK" lamps, instead of "TAIL" lamps. The PARK fuse is Fuse #22 (15 Amp) located in the Smart Junction Box (SJB) in the center of the dash.

HINT: This same fuse also protects the circuits your front park lamps, if they are working, the fuse is not blown.

Tail lights. Not exactly sure if you may be talking about like the park lamps when you turn the lights on or if you are talking about the brake lights. I just want to be sure I am giving you the correct information. If you are talking about the park lamps and you are just having problems with the rear ones, then you are dealing with an electrical issue. Below is a the location of the fuse panel as well as a diagram of the fuse layout. I have marked the fuse that covers the park lamps. The thing is this would also be the front, side and the power to the head light switch so if you are having just rear park lamp problems, again it would be an electrical wiring problem. If you are talking about the brake lights, in that same panel fuse number 25 would be the one to check (not marked with an arrow). Both of them are 15 amp fuses. Hope this helps....

you have fitted a single pole bulb into a two pole socket ,have a good look at the end of the bulb and the look inside socket and you will see what i mean

Have fitted the proper bulbs some have a staggered pin on them only go in one way

Front power distribution box is located in the left-hand rear corner of the engine compartment.
Fuse # 1 instrument cluster check control. Check fuses #4 ,5 &20. There is also a panel under the rear seat . Good luck.

I just use a continuity light and probe the ends of each fuse on each side of the fuse to see if there is power on both sides of the fuse if there isnt then that fuse is open or shorted. replace as neccasary

Remove push-on plastic nut beside parking brake. Detach side kick panel. Remove lower dash panel. Three screws, two bolts. The fuse diagram is on the back of the panel. That's for a 2000. Think it has the same body style.