Re: Stereo - how to wire
开云体育Having just wired up a new stereo, some of this is fresh in my mind. ?A few points:1. most modern radios have two power inputs (colored Red and Yellow). ?Red is usually supposed to be switched, and Yellow is "always on". ? I assumed that the amperage draw would mostly be on the Red wire, with the Yellow only being used for keeping the memory alive. ?However, with my newest radio install, I noticed the yellow wire is thicker than the red, which could suggest the opposite. ? In my installation, I have wired Yellow to the starting battery and Red to the House battery, but this may not be doing what I assume. 2. As you've discovered, simply having a switch in the circuit doesn't do what you want, as it ends up connecting the two batteries. ? You need a relay. ? /g/eurovanupdate/message/161861?is an old post that shows how, but I'll include it here again. (Note: as Duane points out, not sure if your 93 has this Accessory circuit or not?) Here's how I wired in a custom toggle switch and relay which switches the radio into three states: - Always On (house battery) - On with Accessories (house battery) - Always Off Parts: * A 12V relay? * a 3 position switch (On, Off, On) * a fuse (likely 10A to 30A, depending on your radio) * some wire (the trigger wire can be small, but use 14 gauge or thicker wire for the red lines * wire connectors & heat shrink tubing or electrical tape 1. First, find the nearest source of house battery 12V+. ?If you go up behind the fusebox, it's relatively easy to push a wire through the firewall and connect it to the relay in the engine compartment. 2. Add a fuse 3. Wire it up as shown in this diagram. ?? Note: switches and relays may have different?wiring diagrams, so double check your work.
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