* Integrated into the alternator: Many alternators from that era had the voltage regulator built directly into the alternator casing. In this case, you wouldn't see a separate voltage regulator; the entire alternator unit is the regulator. This is the more likely scenario for a 1981 Dodge Ram B350.
* A separate box: Less common for this era, but possible, the voltage regulator could be a separate, small box-like component wired into the alternator circuit. This would typically be mounted nearby the alternator or battery. If separate, it'd likely be a black or dark-colored rectangular unit with several wires connected.
To find it, you'd need to:
1. Locate your alternator: This is usually near the engine's front, connected to the engine via a belt.
2. Inspect the alternator: Look closely at the alternator for any connectors or components that *aren't* directly related to the alternator's terminals (like the large power output terminals). If the regulator is integrated, you won't see a separate component.
3. Look for a small box near the alternator: If it's a separate unit, look for a small, rectangular black box with multiple wires nearby.
Without knowing the exact alternator model in your specific 1981 Dodge Ram B350, it's impossible to give a more precise description. A parts diagram specific to your truck's year and engine would be helpful. You can often find these online through sites specializing in classic car parts.
