high oil pressure?

[chimburt]

Monday morning glitch. whilst sat in traffic this morning i glanced over at the oil pressure guage to find it at full-scale ( max ).
i'm thinking sender/wire off somewhere.
anyone know where i could take a look before i go running to the garage?

[chimburt]

Thanks chaps.
any measurements i can make to establish if the sensor is at fault?
any pitfalls for the unwary in replacing one of these?
4L '95 with the later engine.