I don't know about 'middle of the night' but you will have to run a fused 12v(+) wire from either the full time part of the fuse block or the battery to a power plug you use for the Patriot brake system. It's very common to have the power outlets controlled by the ECU to prevent accessories from running down the battery. One of my cars (VW) has all outlets full time power, the other (Subaru) switch off with ignition or short time later. I rewired one outlet in the Subaru to be full time power.
If you don't want to modify one of the installed outlets to full time power, you can get a power outlet (cigarette lighter) at any auto parts store or Walmart and wire it up yourself. One wire (with fuse) to the (+) battery terminal, the outlet's outside shell must be wired to any close ground connection.
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI