I have a fuse that blows off when the car is turned off connected to a fuse tap adapter like the link below. I don't mind a blue LED, which can be covered with a black tap or marker if it bothers you. For $13, it's hard to beat. It assembles easily but doesn't come with mounting hardware so you'll need to provide screws. =ILEOTHUGMUS9&dchild=1&keywords=add+a+circuit+fuse+tap&qid=1617715180&s=automotive&sprefix=add+a+circuit+%2Cautomotive%2C163&sr=1-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyUkdBNEJBN0RMMVBTJmVuY3J5cHRlZElkPUEwODE3ODk5MU05NDRKNk5GUFZHMCZlbmNyeXB0ZWRBZElkPUEwNTUyNzg0MlFaQkwxSzBKNkVCVCZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
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