I have an 05 Lariat SCrew that didn't come with passenger power or heated seats. I found a set of heated power driver/passenger seats from an 07 Lariat Screw. The truck also had memory seats ( I don't care if they work or not). I got the seats and I started on the passenger side. My truck has a manual seat on pass side and power on the drivers side, (non memory, and no heated). The seats I bought are heated, power driver and passenger. From the picture the plug circled in red was not on my manual seats. Also the wires I marked with a yellow x and line is not on my wire harness. The rest of the harness is there. I borrowed this pic from anothe post but it is the same as my seat I just bought. What is the plug circled in red for and if I go back to the salvage yard and get the harness marked with a yellow line and x do you think it just splices into existing wires in the loom? Any help of diagrams of what the missing wires goes to or if I can splice into what is already there is appreciated. I haven't looked at the drivers side yet but since my current is already power I assume all the plugs will be the same on that side. Thanks guys. Any help is appreciated. If that plug is for power, could I jump it from the drivers side? Then, which plug is the heated circuit going through. I have the Electronic HVAC control with the heated seat switches also from the 07.

 

You are going to have to chase down the wires. Generally the wiring was not complete unless the option was installed. I have not seen a try at pwr driver's to climate / memory seats to know for sure.

You need to make the memory seats work, as this is how the power seat works ( axis controlled by the memory seat module )