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Yes, it is possible both are burned out. I recall a police car coming in for no high beams, after some diagnostics I found both bulbs out.
The vehicle probably uses relays under the hood (year, make, model???) if it is one relay it could have bad contacts. Have someone turn beams on and off, listen under hood (key on, engine off) for a clicking sound, this will be high beam relay.
Had the same issue with my 2004 Trailblazer ( low beams out, high beam would work). Turned out to be a bad relay in the fuse box located under the hood/driver side. OEM number on top of the relay was 15016745. You have two of these side x side. If the lights go out, swap the relay and if the lights come back.... this is your problem. Auto Zone Duralast replacement number is 20601. Told to get an extra because the high current is going to cause it to go again. See the picture for the location of the relay ( side x side, one grey(replacement) and one black (OEM). Hope this Helps!!
On a 2008 Prius, If both High beams work but only one side has working low beams, then it is most likely a fuse. So before breaking your knuckles to change the bulb, check the fuse first. I found out the hard way as my mom distressed to me that her drivers side headlights were out. So without checking to see if low and high were working, I proceeded to remove and replace the bulb - ouch! There are 4 10 amp fuses that protect the circuits for low/high beam function. They are under the hood in the fuse box on the drivers side and they are marked on the box cover. Check them before changing the bulb.
Why yes there is. It's #46 under the hood. Switch relay #45 with #46, do you now have lights? Either clean the contacts by pushing it in and out of the fuse box, or buy a new relay. Cleaning the relay worked for me, but I keep a spare just in case. Very common problem with Envoys and Trailblazers.