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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.
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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