Identify this wire

[Prospect62]

Can anyone tell me what this should be hooked up to? I looked around and can't find any empty spade terminals that look like this should be plugged into. Truck ran fine with it unplugged like this.

 

[reloader64]

That probably goes to the oil pressure sending unit on the back of the block, behind the intake manifold. Low oil pressure creates a ground, turning on the OIL light. When the wire is unplugged, the OIL light doesn't work.

Scott

 

[Prospect62]

That probably goes to the oil pressure sending unit on the back of the block, behind the intake manifold. Low oil pressure creates a ground, turning on the OIL light. When the wire is unplugged, the OIL light doesn't work.

Scott

Thank you I'll look back there again.

 

[cucvrus]

BINGO. Oil pressure sending unit wire.