The fuse for the 2008 Honda Civic EX keyless entry is located in the under-hood fuse box.
1. Open the hood of your Civic.
2. Locate the fuse box on the passenger side of the engine compartment.
3. Remove the fuse box cover.
4. Find the fuse labeled "Keyless Entry".
5. Replace the blown fuse with a new 10-amp fuse.
Note: If the keyless entry fuse keeps blowing, there may be a problem with the keyless entry system. You should have the system diagnosed by a qualified mechanic.