[LMP]

If I read you well, the '96 you have is a 3.4 and this is basically an enlarged 3.1. I cannot be sure for the 3.4, but the 3.1 of former years used a fake oil pressure meter that would just indicate presence or absence of pressure through a fixed resistance circuit and pressure switch (while the 3.8 used a true proportional pressure sender). That might explain the light is lit but pressure needle shows OK if they do not trig at exactly same pressure...but this would mean there are 2 pressure switches...although I do not see that on my '93 diagrams..