Guides → Gate fuse box puzzle
Gate fuse box puzzle
Ignore the two grey-wired bays. Place the straight (I) fuse on the two blue wires, the T-shaped fuse on the three yellow/green wires, and the L-shaped fuse on the two red/orange wires. Validate, then pull the lever.
How to get the fuses
- Dock at the closed Garrison Street floodgate, climb through the sheeted window and reach the unpowered lever.
- Save in the first safe room, then read Gate Switchboard downstairs. Spare fuses are at Allen Radio Store across the street.
- The Radio Store front door is locked. Enter 12 Garrison Street, go upstairs into Apartment 6 and drop through the floor hole.
- Read Gate Fuses and Wires, crawl through the broken wall into the shop, and take the fuse box under the Arkham Electrician poster.
- Unlock the shop's front door, deal with the ambush, then return through the tavern and safe room to the floodgate box.
Optional but recommended before you leave: the Apartment 5 kitchen safe is 1908 and holds early ammo.
Correct fuse placement
Five cross-shaped bays, three fuses. The note's rule is simple: each fuse must join wires of the same colour. Rotate with the shoulder buttons (or the keyboard rotate bind) until the fuse covers every wire in that bay.
- Straight / I fuse — left/bottom bay, two blue wires. Rotate once so it stands vertical.
- T-shaped fuse — top-centre bay, three yellow/green wires. Rotate until it looks like a T and touches all three.
- L-shaped fuse — right/bottom bay, two red/orange wires.
Leave the grey-wired bays empty. Hold Validate, then pull the lever on the right. The floodgate opens and the boat can continue toward the Miskatonic Library Annex.
Video
This is the Chapter 1 floodgate, not the Chapter 2 church lock. The church watergate uses a number code: 1672.
Route and placement cross-checked against TechRaptor, GameRant, AltChar and TheGamer. Reviewed 4 September 2026.