1976 land cruiser oil pressure sender

just got my first cruiser beautiful 76 all original and in great shape
one problem oil pressure worked two weeks ago and now registers zero, although i know i have good oil pressure. i cannot find the oilpressure sender unit location. i suspect it is just a wire falling off or broken
can any one verify location

Your oil pressure sender should be located either down low on the side of the block close to the firewall on driver side, or else on the passenger side I think somewhere near and below the distributor. Hope this helps. Also check out specter at sor.com, catalog page 026 pictures. I think they're about $50.