Alternator Wiring Schematic 2004 Silverado

[ScubaLouie]

Does anybody have a alternator wiring schematic for a 2004 Silverado 5.3l Crew. I need to know the function of the three wires in the plug that plugs into the alternator. The wire colors are blue, gray and brown.

 

THANKS!!

[5Alive]

A lot of views and no reply yet.... hmmm. I'm not a GM tech, but I might be able to help you on this one.

 

The C2 connector on the back of the solid state voltage regulator attached to the alternator is a 4 pin metri-pak (12186568) with only 3 pins used.

 

Pin A, your Dark Blue wire: is called Circuit 5668, and is the Engine ON signal from the alternator regulator to the supplemental brake assist pump motor of the hydraulic brake booster. This wire goes from Pin A of C2 to Pin J of connector C100, which is a main harness connector located under the main fuse box electrical center in the engine compartment. At C100, the Dark Blue wire CHANGES COLORS on the other side of C100 to Black with a White stripe. From there the wire may pass through the firewall and back, but it eventually gets to Pin D of the conncetor that mounts on top of the Supplemental Brake Assist Pump Motor, which sits vertically inboard of your hydraulic brake booster assembly on the driver's side firewall.

 

Pin B, your Brown wire: is called Circuit 25, and is the Generator Field Duty Cycle Signal that goes from Pin B of C2 to Pin 15 of the Powertrain Control Module.

 

Pin C, your Gray wire: is called Circuit 23, and is the Charge Indicator Control Siginal that goes from Pin C of C2 to Pin 75 of the Powertrain Control Module.

 

 

5Alive