2007 T800 Kw tail light back feed

[akwman]

Hello , I have a new used misfit in my fleet . Of course it looks good until you start to nit pick. So last night I turn the truck off , its dark , I walk away ,I see the tail lights have a very small amount of power to them . Every so slight . Of course they are after market round led. But still , it is odd. So should I start at the dash switch or just suspect its gonna be bigger than that after the switch and suspect the Ecm .