Do i need this wire for my rb25det swap into s14

[nyc240sx]

i forgot whats this for on the ka anyone recognize this its yellow with a blue stripe it was on my ka24de harness right beneath the fuse box.thanks

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[Kansei240sx]

oil pressure s/w

[Joe]

and to answer his question, no.

it just controls the light in your gauge cluster.

[nyc240sx]

thanks

[gawdzilla]

not necessary but nice to have a working oil pressure dummy light

[nyc240sx]

iam just hooking up my autometer mechanical oil pressure gauge