What rig do you have? Maybe update your user header...it says for brand "still looking"
The Bird relay n mine went bad a couple years back and I ended up with a dead house battery after a long drive when I expected it to be charged. Maybe a similar problem.....I have no idea of course if your system would be similar or not...
mine is controlled by an intellitec controller and a constant duty relay
the relay went bad not the intellitech controller...
If it was the isolator relay that you've already replaced
maybe it's your controller, or maybe it's not hooked up correctly.(?)
manual for my relay is attached, maybe yours is at least similar.
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