The diagram for the fuse box panel for this car is found in the owners manual. It is also found on the cover of the fuse box.
Try the fuse box
The horn fuse is located in a box under the hood near the battery.
Under the hood, there is a small but oblong fuse box to the left of the battery. Unlatch the lid to it, and you'll see several fuses. You can use the lid (it has a fuse guide) to figure out which one if for the horn. On my 96 sentra, it was the red 10A fuse on the top right side of the fuse box. Can't miss it.
it is located in the in cab fuse box labeled as mirror.
If the dome light and the keyless entry system does not work on a Nissan Sentra it is possible there is blown fuse. The fuse box is found in the passenger compartment.
The 2000 Nissan windshield wiper fuse is located in the fuse box. The windshield wiper fuse will be in the second column, third from the top.
In the fuse box under the hood, right next to the battery
Located in the passenger compartment near steerling wheel. Pull panel to see the fuse box which one is for the radio?
You can get a copy of the fuse box diagram chart for the 2003 Nissan Sentra online at places like Modified Life and Car Care Kiosk. You can also find these diagrams on the inside of the fuse box cover or in the Chilton's manual for that year and model of vehicle.
The fuse will be under the hood in a black box of fuses the lid of the box will have a diagram on the inside.
drivers side up under dash by steering colum