Reverse lights and horn not working,check fuses and bulbs both work,what next?
on 2008 Hyundai Elantra

We check fuses and bulbs

Asked by for the 2008 Hyundai Elantra
You missed the open fuse! Check them ALL with a tester. Test light works great, just touch each side of each fuse to see if test light comes on.
Owners manual is a good place to find what fuse does what and where it is located exactly. Both of these circuits are most likely protected by the same fuse.