What does the voltage regulator for a 1998 jeep wrangler look like?

The voltage regulator for a 1998 Jeep Wrangler isn't a separate, easily identifiable component like a standalone box. Instead, it's integrated into the alternator itself. You won't find a separate voltage regulator to replace. The entire alternator needs replacing if the voltage regulator fails.

Therefore, there's no single "look" to describe. The alternator itself is a relatively large component, typically mounted on the engine, with wires and a pulley. It's usually black or dark gray, somewhat cylindrical, and has various connection points. The internal voltage regulator isn't visible without disassembling the alternator.