oil presure switch?

[KRONER]

Does anyone know where the oil pressure switch is located on the engine of a '99 I4. And why does this light only come on when im below 1000 RPM?

[manybrews]

its on the back of the engine, about half way up the block.

and its coming on because the switch is failing.

[KRONER]

thanks for the help man - i had a feeling it was just the switch buggin out - thanks again