Oil pressure switch

[Morley]

OK, time for me to ask a question...
My son has a 97 Breeze (2.0 SOHC) he just got. He bought it with an oil leak..a BAD one. $6.50 later (and a lot of work) that leak was fixed. It was the cam seal that had blown out.
Now it has a smaller leak that seems to be coming from around the oil filter location. I have read that the oil pressure switches on these are prone to leaking and that it is supposed to be up above the filter...Well, i've looked and can't find any switch. Directly above the filter is the crank sensor but I'm not seeing the presure switch.
Anyone know where it is located? He has a Haynes manual on the car and it mentions removing the switch for testing the pressure, but they NEVER say where it is or have any pictures of the location.
Any help would be appreciated.