Mk2 or Mk3 Carens? From memory the fuse box is located under the r/h side of the dash with the major relays under the bonnet.
Unusual for both sides to go, they are normally fused in sidesseparately, may be something has sent a surge through them but this normally does other damage, I'd get the charge rate checked at the same time, just in case.
PS: If it's a Mk3 then read the posts on here about changing the headlight bulb, it explains how to remove the lamp as a whole piece which makes changing the bulb much easier.
Both the head lights on my Mk2 Carens just failed at the same time, I still have high beam, a brief check of the under bonnet fuse box showed no fuses had blown, is there another fuse box under the dashboard, any advice please.