Blair Witch may not be the best horror game ever made as it certainly has its issues, but it's still a terrifying romp in the woods, and easiest the best game based on the franchise. That said, there are a few tricky moments in the game which may impede your progress, such as the Blair Witch fuse puzzle.
This puzzle takes place in chapter 4, just after you've encountered the White Tree and probably got stumped over the Bunker lock combination puzzle. You'll finally get to the Sheriff's truck, and be tasked with turning on the truck lights. But how do you do that? Let us show you.
How to solve the Blair Witch Fuse Puzzle and turn on the Truck Lights
Once you've found the Sheriff's truck in the woods, you'll find that there's a note that reads "Ch 03. Say 'the light'" - call channel 03 on your radio, and a voice will demand you turn on the truck's headlights. After having Bullet find the keys and trying them, you'll discover something wrong with the power. Flip the switch on the left to open the hood, then reattach the wire to the battery to get some power going.
Now it's time for the fuse box puzzle. Go back into the truck, and underneath the steering wheel you'll find a set of fuses and some rather confusing instructions. However, the puzzle is easier than all this seems.
Remove the dead fuses from the box, but remember - you only need to get the two front headlights working, not drive the truck or anything else. Checking the instructions you'll see that 7 and 9 are the 'Front Lights', so these are the ones you need working. 9 is fine, but 7 has a dead fuse.
Checking the instructions again, you'll see that 7 requires a 20 Amp fuse. Since there aren't any spares around, you'll just have to refer to the list and see if any others have a 20 Amp fuse installed - such as number 6, which is the Cigar Lighter! Remove fuse 6 and put it in slot 7 and Ellis should tell you it's good to go - so back out of the fuse box and activate those lights! We can't be responsible for any terror to come afterwards, however...