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So I found a RAP module in the junkyard and would like to wire it up. Instead of pulling the dash to use the factory connectors, I am making my own harness. My question is, why is circuit 645, the W/LB wire, wired like this? My only guess is if one side loses connection, the circuit is still complete, but I’m not sure. I can easily wire it up like this, but I don’t know if I really need to do that. 
