If you are using the new VHX gauges, box and sender, you can actually program the box to accept a factory sender for temp, so you could use the factory engine temp sensor, and tie in the dakota digital harness lead instead of using two senderd in the engine.
The american autowire green temp wire in the harness (assuming you have a classic update) simply runs from the guage disconnect plug through the firewall and is a flying lead with the engine group of wiring. You dont have to use it, or you can use it to tie in to the factory sender.
I am not sure about Dakotas LCd style gauges, but the VHX allows you to select the type of sender for the inputs when you power it up.
hope you have an answer from one of us!
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