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3-Position Switch Wiring Diagram - Auto/Off/On with Red & Green Indicator Lights

Three-position switch wiring diagram with 12V input and red/green light outputs
Three-position switch wiring diagram with 12V input and red/green light outputsOriginal file
Three-position switch wiring diagram with 12V input and red/green light outputs

Reference · 1987-1991 BroncoAll 175 wiring diagrams

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Wiring diagram of an Auto/Off/On switch with 12V input and outputs to red and green indicator lights.

Part of 1987-1991 Ford Bronco Wiring Diagrams

AI caption · Photo 21 of 50

This document is a simple hand-drawn wiring diagram for a three-position toggle switch, showing how to wire indicator lights. The left side of the diagram shows the three switch positions: 'Auto' (up), 'Off' (center), and 'On' (down), depicted with dashed arrows indicating the lever throw toward a black rectangle representing the switch body. The right side of the switch body shows three terminals: the top terminal labeled 'Out To Red Light', the center terminal labeled '12V In', and the bottom terminal labeled 'Out to Green Light'. From this diagram a reader can learn how to connect a 12-volt power feed to the center terminal of the switch and route the switched outputs so that a red indicator light illuminates in the 'Auto' position and a green indicator light illuminates in the 'On' position, with the center 'Off' position powering neither output. The document contains no year, make, model, part number, wire color, or fuse information, it is strictly a terminal/position layout for a single ON-OFF-ON style switch. It was uploaded to a 1987 Ford Bronco gallery and may be part of a multi-page set with a second scan.

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Frequently asked questions

Which terminal of the switch gets 12V power?
The center terminal is labeled '12V In', so the 12-volt supply connects to the middle terminal of the switch.
What are the three switch positions shown?
The switch has three positions: 'Auto' (top), 'Off' (center), and 'On' (bottom).
Where do the indicator lights connect?
The top output terminal is labeled 'Out To Red Light' and the bottom output terminal is labeled 'Out to Green Light'.
Does the diagram show any fuses or wire colors?
No. The diagram only shows the switch positions (Auto/Off/On) and three terminals (Out To Red Light, 12V In, Out to Green Light); no fuses, wire colors, or part numbers are shown.

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