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Ford Taurus SHO 3.2L Charging System Wiring Diagram - Alternator/Regulator

Charging system wiring diagram for the 3.2L SHO showing battery, integral alternator regulator, fuse links and ignition switch.

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This is page 12-2 of a Ford factory-style wiring diagram covering the charging system for the 3.2L SHO engine (Ford Taurus SHO). The diagram shows the integral alternator/regulator (IAR) circuit, including the battery, starter motor/solenoid (referenced to page 20-3), engine compartment fuse box (page 13-1), fuse links T and G (12 gauge gray) and fuse link F (16 gauge gray), the ignition switch (hot at all times, with switch testing referenced to page 149-6), and the instrument cluster alternator warning indicator with its 500-ohm resistor (page 61-1). Wire circuits identified include 38 BK/O and 30 BK/O (12V feeds), 36 Y/W (stator feedback through connector C1066), 16 R/LG (ignition-switched feed through C299, splice S210, and C250), and 904 LG/R (indicator circuit through C250, C100, and C154). Grounds G100 (engine) and G101 (body) are shown via black wires (grounds page 10-1). A text callout explains regulator operation: with voltage applied, the regulator allows current from the sense A circuit to the alternator field coil; AC output is converted to DC by an internal rectifier and supplied through the B+ terminal, while the S (stator) circuit feeds back roughly half battery voltage to turn off the warning indicator.

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Frequently asked questions

What fuse links protect the 3.2L SHO charging system?
The diagram shows Fuse Link T and Fuse Link G, both 12 gauge gray, plus Fuse Link F, 16 gauge gray.
What wire color is the alternator stator feedback circuit?
Circuit 36 is Y/W (yellow/white) and passes through connector C1066.
What circuit connects the alternator warning indicator to the regulator?
Circuit 904 LG/R (light green/red) runs from the instrument cluster through connectors C250, C100, and C154 to the integral alternator/regulator (IAR).
How does the alternator warning indicator turn off?
The S (stator) circuit feeds back a voltage signal from the alternator to the regulator—typically half battery voltage—which the regulator uses to turn off the indicator.
Where are the charging system grounds on this diagram?
Black (BK) wires go to G100 (engine ground) and G101 (body ground); see Grounds page 10-1.

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