Case 750K won't release parking

Working on a
Case 750K
s/n; JJG0365210

Machine stopped and gave transmission fault light, no can, and parking brake light all came on while operating. Removed the dash and found multiple broken wires, rubbed wires, and corroded connections. Removed the panel and repaired all wires. Reinstalled and everything is acting properly now, switches all work, dash shows F-N-R, etc. However the parking brake won't release still. You can only start it with at least one of the levers up, the lights...

Case 750K won't release parking

Case 750K won't release parking