Engine Electrical Connectors: Generator

2009 Chevrolet Tahoe Base, 4.8 CSECTION Generator
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Generator Connector End View
GM1522871Courtesy of GENERAL MOTORS CORP.
Generator Connector Parts Information

Connector Part Information 
  • OEM: 12186308
  • Service: 89046837
  • Description: 2-Way F JPT, Sealed (BK)
Terminal Part Information 
  • Terminal/Tray: 4-964286-1/16
  • Core/Insulation Crimp: E/1
  • Release Tool/Test Probe: 12093647/J-35616-4A (PU)
Generator Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 BN 25 Charge Indicator Control/Charge Indicator Signal
2 GY 23 Generator Field Duty Cycle Signal
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.