The cluster is out, you won't believe what I found

RedFish said

I don't think that wire is suited for this application. It's not my car though. Good luck with it.

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I'm with red on this one, the wire size for this application needs to be at least the size of the harness wires to be safe. Telephone wire is not made to carry much current at all the limiting factor is not the conductor but the insulation. it is your car but
You may want to reconsider using the telephone wire