New battery but no power.
I put a new battery in. Started it and drove it a few miles to the store. All good. Returned to the car and no power. Nothing, nada. No lights, no horn no click when I turn the key. Took the battery out and had it tested. Just purchased that morning. Tested great. Thinking possibly a relay or master fuse ( if there is one). Just don't know. Any help appreciated.
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