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As mentioned above - relays should have 4 connections - ground, major positive power from a direct battery source, minor positive activation power from a switched source (to turn it on), and a major power out feed to the related device.
Another way it can be wired is to switch one relay control leg to ground & jump the battery power to the other relay control leg...
But to the O/P pay no attention to this as it only complicates things..
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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