Description
Vehicle Compatibility & Applications
This Hitachi type 12V alternator voltage regulator is designed for Isuzu diesel and General Motors industrial applications using 3 pin IG–L–S (Sense) regulators. It is suitable where the original alternator uses an internal regulator with external fan and a matching plug layout.
- Reference: REG3015
- Applications: General Motors; Industrial applications; Isuzu diesel
- Typical engines: Isuzu 2.0L diesel; 2.2L diesel; 2.8L diesel
- Typical models: Isuzu KB250 diesel / turbo diesel (TD) and related industrial engines
- OE / cross reference: GM 94167410; Hitachi L150-33155
Always compare the OE number, plug configuration and alternator label with your original unit before ordering REG3015.
Specifications
- Reference: REG3015
- Part type: Alternator voltage regulator
- System voltage: 12V
- Operating voltage: 14V
- Charging voltage: 14.5V (VS ≈ 14.5V)
- Manufacturer type: Hitachi
- Circuit regulator: A-circuit
- Type: IR / EF (internal regulator, external fan)
- Pins: 3P IG–L–S (Sense–IG–L)
- Primary usage: Isuzu 2.0L / 2.2L / 2.8L diesel; Isuzu KB250 diesel / TD; GM industrial engines
- Function: Controls alternator output voltage and field excitation
- OE numbers: General Motors 94167410; Hitachi L150-33155; Isuzu equivalent as per OE catalogues
Features
- Hitachi style 12V alternator regulator for Isuzu diesel and GM industrial applications
- 3 pin IG–L–S (Sense) plug layout for direct replacement on matching alternators
- A-circuit internal regulator with external fan configuration for common Hitachi units
- Charging voltage calibrated around 14.5V to protect batteries and electrical systems
- Compact OEM-style design to simplify alternator reconditioning and field repairs
Why Buy From Us
- Local stock on popular Isuzu KB250 and industrial charging components like REG3015
- Standard 12 month warranty under normal operating and installation conditions
- Fitment assistance using OE numbers, alternator labels and plug photos
- Secure online ordering with reliable nationwide courier delivery
- Trusted by workshops, fleets and industrial users for dependable alternator parts
Installation & Maintenance Tips
- Disconnect the vehicle battery before removing or installing the alternator or regulator.
- Confirm that your alternator is a Hitachi type unit with 3 pin IG–L–S plug and A-circuit layout before fitting REG3015.
- Inspect brushes, slip rings and internal wiring for wear or overheating while replacing the regulator.
- Ensure all main power and earth cables are clean and tight to prevent voltage drop and charging faults.
- After installation, test charging voltage at the battery with engine running and electrical loads applied to confirm correct regulation.
- For critical industrial or fleet equipment, have the charging system load-tested by a qualified auto electrician.
Important: Product information, kit contents and compatibility are provided as a guide and may contain errors or omissions. Please verify that this part and any included components are correct for your vehicle before installation. For full details see our Website Disclaimer (Errors & Omissions).