What batteries are shown in this dual battery wiring diagram?

Two Duralast Gold batteries are shown at the top of the diagram, plus a photographed auxiliary bank of two more batteries mounted in a wooden box.

What positions does the battery selector switch have?

The main rotary battery switch is labeled with positions OFF, 1, 2, and 1+2. Two additional rotary switches are shown with OFF positions visible.

How are positive and ground cables indicated?

Red cables indicate positive connections and black cables indicate negative/ground, including a chassis ground symbol on the right side.

Does the diagram specify fuse ratings or wire gauges?

No. The diagram is purely pictorial with photos of components; no fuse ratings, wire gauges, or part numbers are shown.

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Dual Battery & Winch Wiring Diagram - Isolator Switch Setup, 1978 Chevy C/K

Photo-based wiring diagram for dual battery, alternator and winch

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Photo-based wiring diagram routing power between dual batteries, alternator, battery switches and a winch.

AI caption July 2010 · Photo 437 of 515

This document is a homemade pictorial wiring diagram (uploaded as 'wiring.jpg') showing a dual/auxiliary battery and winch power setup. At the top, two Duralast Gold batteries are shown linked with heavy red (positive) and black (ground) cables. Power routes through an alternator (highlighted in a red box), a continuous-duty solenoid, and a rotary marine-style battery selector switch with positions labeled OFF, 1, 2, and 1+2. Two additional rotary disconnect switches (labeled OFF) sit downstream and feed a photographed auxiliary battery bank — two batteries mounted in a wooden box connected with red cables. A chassis ground point is indicated by a ground symbol on the right side. Finally, the circuit powers an electric winch shown at the bottom of the diagram with its wire rope and roller fairlead. A small remote or indicator switch is also depicted near the alternator/solenoid area. The diagram contains almost no written text — it communicates entirely through component photos and colored cable routing (red for positive, black for negative/ground). A reader can learn the general layout for charging and isolating multiple batteries and feeding a winch through selector/disconnect switches, but no wire gauges, fuse ratings, or part numbers are provided.

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Frequently asked questions

What batteries are shown in this dual battery wiring diagram?: Two Duralast Gold batteries are shown at the top of the diagram, plus a photographed auxiliary bank of two more batteries mounted in a wooden box.
What positions does the battery selector switch have?: The main rotary battery switch is labeled with positions OFF, 1, 2, and 1+2. Two additional rotary switches are shown with OFF positions visible.
What does this wiring setup power?: The circuit feeds an electric winch, shown at the bottom of the diagram with its wire rope and roller fairlead.
How are positive and ground cables indicated?: Red cables indicate positive connections and black cables indicate negative/ground, including a chassis ground symbol on the right side.
Does the diagram specify fuse ratings or wire gauges?: No. The diagram is purely pictorial with photos of components; no fuse ratings, wire gauges, or part numbers are shown.