Question about 2008 Toyota Sienna

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2003 Sienna tail lights don't work when headlights are on

I was changing a few trailer light bulbs with the lights on, and accidentally shorted the tail lights on the van and trailer by touching the the wrong 2 things together. (I know - IDIOT) All lights in the front of the van work. Rear turn signals/hazards on van and trailer work. It's just that the running tail lights (van and trailer) will not light when head lights are on. With trailer disconnected the van's tail lights still do not work. I checked the fuses under the hood, and all seem fine. Is there another fuse somewhere that would cause the tail lights not to work? Help!

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  • 5 more comments 
  • jameskuehl Nov 12, 2008

    Ed, there's not a fuse box under the dash. Bunch of boxey little plug things with wires, but no fuses that resemble the ones in the engine compartment fuse box. Any other thoughts?

  • jameskuehl Nov 13, 2008

    There is no fuse box under there. I laid on the floor looking up above the park brake pedal (I could even see the back side of the instrument panel) - no fuse box, only a couple of relays. The ONLY way there are fuses there is if they are facing up, and are completely out of sight, in which case I would have to have a mirror and flashlight to see them.

    I again checked the fuses in the fuse box in the engine compartment... no dice. Maybe I should mention that this is an '03 Sienna CE.

  • jameskuehl Nov 13, 2008
  • jameskuehl Nov 24, 2008

    Eureka!!! With the diagram you provided I easily found the interior fuse panel (which was hidden behind the "spare change compartment" - how sneaky!).

    Thanks Ed!!!

  • drgen03 Feb 14, 2009

    98 sienna...front lights that light up along with tail laights when u turn the knob before turning headlights dont go on..break lights work, dont see a problem with bulbs or fuses..basically only headlights work and can be seen at night. nothing else not the taillights or the front signal lights go on.. can anybody help?

  • ewer4 Mar 12, 2009

    I have the same problem, I put a u-haul trailer wiring harness in my 2003 TOYOTA SIENNA in 2004 and it worked until March of 2008, The fuse for the taillights blew, I replaced it and it worked for a day. I replaced the fuse twice and no better, I ran out of 10 amp fuses so I used a 20 amp, Big mistake, Not one minute went by and I had smoke in the cab of the van,so I took out the fuse and the wiring harness for the trailer lights, Taped all the wires nicely, replaced the blown fuse with a new 10 AMP fuse, The car tail lights worked until the next day and was blown again, PLEASE HELP.... PS The smoke came from the U-HAUL wire harness

  • Anonymous Mar 31, 2014

    Running fine just no interior electrical working or tail lights or turn signals



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  • Toyota Master
  • 1,861 Answers

Look under the dashboard, next to/above the park brake pedal, for the interior fuse box. It has a black plastic cover. Remove the TAIL fuse, and see if it is blown. This should get you fixed up. Hope this helps, and Thanks for choosing FixYa.

Posted on Nov 11, 2008

  • 2 more comments 
  • Toyota Ed Nov 12, 2008

    Please look again. I am replacing a sunroof in an 03 Sienna as we speak, I know it is there.

    Look under the driver side of the dash, (in front of your left knee, if you are sitting in the driver seat). You pretty much need to be leaning on the floor & looking up to see this...

    The tail fuse is the last one down, 2nd row from the left.

    The fuses are at the TOP of the Junction Box under the dash. Get back to me.

  • Toyota Ed Nov 13, 2008

    Send me your e-mail, I will return you a .pdf showing you exactly what it looks like.

  • Toyota Ed Nov 13, 2008

    It is on its way.

  • Toyota Ed Nov 25, 2008

    You are very welcome. Glad to help.

    Thanks for choosing FixYa. That is what we are all about.

    "Sharing experience, helping others; solving problems.

    Have a Happy Thanksgiving.



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