Drivers to dual power seat upgrade. November 11, 2019, 07:14:56 AM I was taking the interior apart in my bird for a couple reasons. One thing I noticed was I had power drivers seat but the wiring for a power passenger seat. Pulled the seats and carpet and found that the factory just tossed in an extra harness for a power seat and it was not plugged in. So I pulled the harness out and laid it out properly for my seat. I could not find where the harness plugged into on the passenger side for power and grounds. After some more research I noticed that the factory just shoved in two drivers side power seat harnesses and buried the other under the carpet. I figured that out by looking at the pin outs on the passenger side harness and found two wire were wired the same as the drivers. So I am thinking I will make the extra harness pin properly for the passenger side and tap into the powers and grounds. The only thing I can not find is what the purple/yellow wire does in that harness.