First the windshield wipers quit working and now I noticed the rear passenger side seat has been getting hot enough under my daughters car seat to melt the seat. What could this be.

Needs new motor

Do the wipers work ? Fuse for wipers is same as washer pump .
Principles of Operation
The wiper motors receive inputs from the following:

• Multi-function switch
• Powertrain control module (PCM)
• Ignition switch
• Smart junction box (SJB)

The following components are integrated in the wiper motors:

• Windshield wiper motor module
• High/low speed relay
• Run/park relay
• Washer pump relay
• Park sense (Hall-effect sensor)

Washer System
The windshield washer and the rear window washer are activated by the internal wiper motor modules when it receives a ground from the multi-function switch between the washer inputs. Depending on the correct ground, the internal wiper motor modules activate either the windshield washer or rear window washer relays (internal) by grounding the respective relay coil. When either module is activated, it connects voltage to the washer pump while the deactivated module provides ground to the washer pump. In this manner, voltage polarity is reversible to achieve directional change of the washer pump and washer fluid.

• The washer pump is inoperative

• Circuitry
• Washer pump
• Multi-function switch
• Windshield wiper motor
• Rear window wiper motor

• Go To Pinpoint Test I .

Does your expedition have programmable/recall memory option for seats an mirrors ?
Driver Seat Module
The power driver seat and power exterior mirrors are controlled by the driver seat module (DSM) only when the vehicle is equipped with the programmable/recall memory option.
On the Expedition Limited, the power fold exterior mirror option is controlled by the DSM. Before running a self-test or retrieving codes, the power fold switch must be inactive for at least 30 seconds.
This is a complex vehicle , electronics , control modules an serial data communication networks. You mite be better off taking it to the dealer or some other repair shop . There could be DTC'S - diagnostic trouble codes stored in the SJB - body control module !
B1667 Mirror Driver Up/Down Motor Stalled Go To Pinpoint Test D . B1668 Mirror Driver Right/Left Motor Stalled Go To Pinpoint Test D . B1669 Mirror Passenger Up/Down Motor Stalled Go To Pinpoint Test D . B1670 Mirror Passenger Right/Left Motor Stalled Go To Pinpoint Test D . B1735 Mirror Driver Vertical Switch Circuit Short to Battery Go To Pinpoint Test D . B1739 Mirror Driver Horizontal Switch Circuit Short to Battery Go To Pinpoint Test D . B1743 Mirror Passenger Vertical Switch Circuit Short to Battery Go To Pinpoint Test D . B1747 Mirror Passenger Horizontal Switch Circuit Short to Battery Go To Pinpoint Test D . B2312 Mirror Horizontal Feedback Potentiometer Circuit Failure Go To Pinpoint Test D . B2314 Mirror Passenger Horizontal Feedback Potentiometer Circuit Short to Battery Go To Pinpoint Test D . B2316 Mirror Passenger Vertical Feedback Potentiometer Circuit Failure Go To Pinpoint Test D . B2318 Mirror Passenger Vertical Feedback Potentiometer Circuit Short to Battery Go To Pinpoint Test D . B2320 Mirror Driver Horizontal Feedback Potentiometer Circuit Failure Go To Pinpoint Test D . B2322 Mirror Driver Horizontal Feedback Potentiometer Circuit Short to Battery Go To Pinpoint Test D . Normal Operation During normal operation, when the front wiper wash is selected, the windshield wiper motor provides power to the washer pump through circuit CRW14 (BU/WH) and ground is provided to the washer pump through circuit CRW12 (GY/OG) and the rear wiper motor. If rear wiper wash is selected, the rear wiper motor provides power to the washer pump through circuit CRW12 (GY/OG) and ground is provided to the washer pump through circuit CRW14 (BU/WH) and the windshield wiper motor.

Possible Causes
• Multi-function switch
• Open in circuit CRW14 (BU/WH), CRW12 (GY/OG), CRW07 (GY/BN), CRW20 (GY/YE), SBB49 (RD) or GD149 (BK/GY)
• Short to ground in circuit CRW14 (BU/WH), CRW12 (GY/OG), CRW07 (GY/BN) or CRW20 (GY/YE)
• Washer pump
• Windshield wiper motor
• Rear wiper motor
  This is

Check under the hood along the firewall, below the windshield around ac evap. and drain area. This is a common place for water to enter and flow by various means (duct system) to passenger rear floorboard as well as slight passenger side front...but usually noticed in passenger rear floorboard.

there is 2 wiper motors . 1 for the drivres side and the other for the passenger. sounds like a bad passenger side motor

a couple things to look at if it has a sunroof the sun roof would have drain hoses that run down in each corner next you need to look at the cowl this is the section in front of the windshield that has a drain on it as well if you find nothing there the next step would be to remove the seats and carpet and sit in the car while running water over it either way you should remove the carpet and make sure it is dry all the way threw or mold will start to grow and you will never get ride of it not good for your heath other key spots to look at is if the windshield was ever replaced it could be a poor seal

try changing your cabin filter, it is located in front of the passenger, under the hood and just below the passenger side windshield wiper-just open the plastic door, there it is...

It's a loose / broken hose running from the washer fluid reservoir to the windshield wiper. Trace the hose and look for the leak. May need to pull up the back seat since that seems to be where the leak is.

Charlie

ts likely a leak in the seal for the windshield Take it to an auto glass shop they have a tool its like a neddle and they can shut some sealer under the molding it olny takes a few minutes and if they can find the spot where its leaking it should stop but its hard for them to tell so if they don;t get it the first time don;t get to mad at them

The hot floor is the catalitic converter. It may be bad, but you need to find out why it got hot. usually lean codes will be present with this problem. could be a bad vacuum leak. mass air flow sensor could be bad. as far as the water being a 2006 I do not think it is the windshield, probably the drain is plugged up for your a/c look under the hood, passenger side, there should be a tube that hangs down around where the a/c lines go in to cabin. you can try to back flush it or run something up in it to free it up. good luck

the linkage on the arms has broken.