Which fuse is the starter relay in power distribution box for a 1999 Ford Ranger?

There isn't a fuse for the starter relay itself in the power distribution box (under the hood) of a 1999 Ford Ranger. The relay is controlled by a circuit protected by a fuse, but the relay itself isn't fused directly. You'll need to find the fuse that protects the power going *to* the starter relay. This is typically a high-amperage fuse.

Your best bet is to consult your owner's manual. It will have a diagram of the fuse box showing which fuse corresponds to the starter circuit. The fuse might be labeled something like "Starter," "Ignition," or might show a diagram with the starter motor. If you don't have the manual, you can usually find a PDF version online through a Ford parts website or a repair manual site.

Important Note: Before checking or replacing any fuses, always disconnect the negative battery cable to prevent accidental shorts.