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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2011 Posts: 118 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2011 Posts: 118 | hook up new fuse box in truck, have 2 wires that say 12 volt battery, do they go directly to battery, if so, why 2 wires? | | | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | Could be....one wire does go directly to a 12 volt source, this would be for the 'unswitched' circuits. The other one goes to a 12 volt source through the ignition switch. this is for the 'switched' circuits.
A simple test with an ohmeter would verify which one is which. Circuits like lights, brakes, horn would be common to unswitched wire. Oher circuits like radio, heater would be common to the switched wire. If no fuses are installed yet, be sure to make the ohmmeter check on the feed side on the fuse holders.
Six volt guy living in a twelve volt world
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