This Generator (Alternator) Pigtail 4 Pin Regulator is built to work with CORE ECU by HP Tuners. In combination with EFIConversions’ pigtail, this standalone ECU delivers superior control, performance, and customization options for Generation 3 and Gen 4 LS platforms. Whether you’re a professional or auto enthusiast, this pigtail will help you overcome the limits of factory ECUs for applications such as:
- Circuit & Drag Racing
- Rallying
- RestoMods
- Engine Swaps & Transplants
DIY PINOUT DETAILS:
| CAVITY | WIRE | FUNCTION | OTHER END |
| A | BLOCKED | - | - |
| B | 18 AWG RED | TURN ON (CHARGE) SIGNAL | 470 OHM RESISTOR, THEN CORE ECU C4 |
| C | BLOCKED | - | - |
| D | BLOCKED | - | - |
To prevent damage to your generator (alternator), you must install a 470 ohm resistor inline between the generator (alternator) and the CORE ECU.
470 ohm resistor is not included.
BEST PRACTICE:
CORE ECU by HP Tuners engine harness COR-HAR-001 and COR-HAR-002 use an inline 500 ohm resistor in the electrical center (fuse block) in the form of a mini fuse. While 470 ohms is commonly recommended, 500 ohms is completely acceptable.
"Why is this connector white in color?"
 |
Commonly, the aftermarket uses a black connector with four available cavities and install a red cavity plug in cavities A, C, and D. Aptiv (formerly Delphi) made this white connector with cavities A, C, and D molded as blocked (no cavity plug required). We simply see no need to use the black connector when the correct connector can be used for this application. |
This Generator (Alternator) pigtail meets or exceeds the quality within Original Equipment (OE) harnesses:
- Assembled with the same materials found on production engine harnesses.
- Terminals are crimped with production applicators and/or Rennsteig hand tools to exceed pull test requirements.
- Assembled in the USA