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1995 Ford Bronco Charging System Wiring Diagram - Alternator & Regulator (12-1)

Charging system wiring diagram for a 1995 Bronco showing the generator/voltage regulator, battery, charge indicator and color-coded circuits.

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This is page 12-1 of the 1995 Ford Bronco electrical/vacuum troubleshooting manual, showing the Charging System wiring diagram. It illustrates the circuit from the battery (grounded at G101 body and G103 engine via BK wires) through Fuse Link J (12 GA gray) to the generator/voltage regulator assembly, which contains the rectifier, regulator, and sensing/switching circuits with I, S, and A terminals plus F screw and A screw. Wire circuits shown include 38 BK/O (B+ output), 36 Y/W, 4 W/BK (stator feedback), and 904 LG/R to the charge indicator. The right side shows the ignition switch (hot at all times, page 13-3, switch testing on page 149-2) feeding 16 R/LG through connector C269, splice S206, and C250 to the 500-ohm charge indicator in the instrument cluster (page 60-4). Connectors identified include C153, C154, C139F/C139M, C202F/C202M, C250, and C269, with component location grid references such as 151-2 F5, 151-3 A6, 151-2 C1, 151-2 A8, and 151-3 D1. An explanatory callout describes regulator operation: current flows from sense A circuit to the alternator field coil, AC output is rectified to DC at the B+ terminal, and the S circuit voltage (typically half battery voltage) turns off the charge indicator. Diagnostic info is in Service Manual section 14-00.

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Frequently asked questions

What fuse link protects the 1995 Bronco charging system circuit?
Fuse Link J, a 12 gauge gray fuse link, is in the B+ output circuit between the generator and the battery/starting circuit.
What wire colors are used in the 1995 Bronco charging system?
Circuit 38 is BK/O (black/orange), circuit 36 is Y/W (yellow/white), circuit 4 is W/BK (white/black), circuit 904 is LG/R (light green/red), circuit 16 is R/LG (red/light green), and grounds are BK (black).
How does the charge indicator work on the 1995 Bronco?
The charge indicator (500 ohms, in the instrument cluster) receives 12V in START or RUN through 16 R/LG from the ignition switch. The S (stator) circuit feeds back a voltage signal — typically half battery voltage — which the regulator uses to turn off the indicator.
Where are the charging system grounds on the 1995 Bronco?
G101 is the body ground and G103 is the engine ground, both connected to the battery negative via BK wires (location views 151-3 D1 and 151-2 C1).
Where is diagnostic information for the 1995 Bronco charging system?
The diagram refers to section 14-00 of the Service Manual for diagnostic information, page 20-1 for the starting system, page 13-3 for the ignition switch/power distribution, and page 60-4 for the instrument cluster.

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