Yes - as long as the switch is hooked up to the wire that runs to the gauge.... you should see the oil pressure light come on before you start it and go off when it starts. You can hook up a mechanical gauge to the switch port on the filter housing if you want to see the pressure - you don't have to actually install the gauge - just use it to verify pressure.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum