power seat wiring, 07 mercury marquis

You already know that there are 4 motors in the seat. If the rocker switch is for sliding the seat front and rear, chances are it will handle the current of that function. You will have to build 3 sets of the relays for the other functions. There should be 8 wires coming from the seat. 2 go to the rocker switch and 2 to each of the motors. If you find the ones going to the switch you should be able to apply power to one and ground to the other, try the switch, if it moves properly you are set, if it moves backwards, reverse the wires. The other motors will go to the motor out of the relays. Connect and if they move the right direction, leave them. If they move backwards reverse the motor wires.

Thanks, but it seems a bit more complex than that, as I have TWO plugs. Three of the motors go into one plug and the motor of which we just spoke, is wired to the other.

I wish!No, one plug is brown & consists of wiring for 3 motors. The other plug seems to be a cross between a data cable & a seat plug. Two of the terminals in the plug are pins that work the seat back and the rest appear as small blades like in a data cable. a mess of them as well!

I found the info i needed at the local library. The schematic does not show relays needed for the seat operation! The switches used on the door panel are wired directly to the seat motors. The multi plug utilizes 4 wires for the seat mounted lumbar support switch and the related compressor motor. 20A fuse is all that is needed. Thanks for your help with this.