>> Current issue, startup blink says gauge is getting power.  Trouble is open circuit in the gauge sender or the line from sender to the gauge.  Since you have the old controller, pull the plug off the level sender.  If the gauge pegs and blinks then the problem is *not* at the panel connector but farther back, likely at sender connector.  If no peg/blink then fold the panel connector open and very carefully tweak the spring contacts to have a bit more spring in them.  If no cure and gauge mounting nuts are snug you'll have to track it with a meter. <<

I took the plug out and the gauge goes all the way left and the light blinks.  What should I check from here?

Thanks,
Bryan