Check the fuses under the dash. Other than that im sorry to say its either of 2 things ....... oil pressure sending unit or oil pump
---------- Post added at 08:49 PM ---------- Previous post was at 08:48 PM ----------
Easiest would be move around the oil sending unit connection maybe it wiggled loose
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.