oil light and buzzer

[dubaroo]

I have done an engine swap DG for DG, my original engine only had the one oil pressure switch, the new one has the 2. The oil light and buzzer come on now just before 2000 revs. Am I right in thinking I need to alter some wiring to accommodate this extra switch?

[Aidan]

earthing the wire that would go to the second high pressure sender will shut up the bod. Worth fitting a pressure gauge using a remote take off from the low pressure switch hole so you can see what your op is. 

[ajsimmo]

Your dash must have the BOD circuit, so I'm deducing you had an early engine in a late van. Therefore your wiring should be there for the 2nd switch, and it was earthed with the last engine. You've now fitted a late engine, connected the correct wire to the front switch and it buzzes at ~2k rpm? So either bad wiring, bad/wrong switch, or low oil pressure. First check you don't have a second blue switch in there (it should be monochrome of some shade - black/grey/white for different pressures).
Does the buzzer go off again at higher revs? Then possibly borderline pressure with 2 bar switch. If it always does it, even from cold, and the buzzer doesn't go off again at revs, it almost certainly isn't a pressure issue, but your dash isn't seeing a switch closed earth at 2k rpm.

Sent from my moto g(30) using Tapatalk

[dubaroo]

On further investigation, I have traced the wiring back. The van was registered Apr 89, I'm guessing it did have an earlier engine fitted at some stage and the wire from what would have been the high pressure sender had been earthed. I am going to fit some new terminals, and connect the switches the right way, hopefully this will sort the problem. I have a video of the engine running in its previous van, including the dash  whilst being taken up the rev range, so I'm happy the pressures are good. might have a look at the pressure gauge idea just for peace of mind.
Thanks for the replies