Oil light not working

Mopar92 said

If the sender connector has 12 volts, and I hook it to the ground... won’t that like tig weld or something. Sarcasm. Guess it’s a ground wire and the sender completes the ground? So there won’t be 12 volts? I’m confused. Thanks

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All wires have current on them at some point. There is a positive side and a ground side of a circuit. At you amp gauge there's a red wire and a black wire. There are a bunch of circuits with chassis ground points downstream of this large black wire but make no mistake ... it is hot. Anyway...
The 12 volts you'll measure on this oil sender wire is what travels through the bulbs filament. No welding with that.