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Electronics In Car Entertainment (ICE), Sat-Nav, lighting, wiring etc.

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post #6 of 6 (permalink) Old 8th February 2009
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Originally Posted by marc0 View Post
Normally you would'nt load up an existing supply because you would take your cable to the coil of a relay.
This would only draw milliamps.
You are correct in what you say. To do it properly you would take a switched feed from somewhere to the relay coil , then take a direct feed from the battery, through a fuse to the common pole of the relay. Then connect your load to the n/o contact of the relay.

In my experience though, unless you have the knowledge, it is all to easy for DIYers to find a convenient switched feed and connect their load directly to it.

Why do today what you can put off until tomorrow...

Wanna see what I drive? No pics of the latest Passat, but you can see the Scenic II here and the CB1000R here!

Previous Passat here and Bandit here.
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