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I know some modules use a 5v ref signal but that is usually to some sort of variable resistor with a return line. I don’t think that is the case here I was just wondering if there should be any voltage present or if it is just completion of the ground circuit. Bentley and ProDemand diagrams don’t specify which it is. I guess I just have to get in there and check it both ways taking care not to fry the transmission control module. That’s for your reply. I will post a follow up here in case anyone is curious.
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