Technical Problem with Fiat Tipo

[sppuuddy]

Have a 1993 Tipo and the oil light comes on and stays on when the ignition is turned off, keys removed. It has enough oil and the light does go off when engine starts anybody got any ideas what could cause this. Have to remove cable from battery to stop it draining battery.

 

[fingers99]

Only thing I can suggest is that the cable insulation has failed somewhere between the light and the sender.