Question about 2003 Ford Expedition

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Passenger heated/cool seats not working

The heat/cool function on the passenger seat on my 2003 expedition is not working. There is no light at the switch.

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The seat switch or the heated seat relay is bad.Always check your fuses first.

Posted on Aug 01, 2009

  • Carmen Sandiego
    Carmen Sandiego Jan 10, 2014

    Recently I've been having problems with my heating and so I called . They came right over and fixed the problem right away, and now it works great.

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2007 Buick Lucerne CXL: Cooled seats not working. LIghts come on, temperature adjusters work but the motors under the seats do not come on.


Air Circulation
When the heated/cool seat switch is pressed to initiate operation of the climate control seat (CCS) system, cabin air is drawn through the heated/cool ventilation module air filter, then directed through passages in the foam of the seat cushion and seat back to the seat's occupant. In order for the CCS system to operate to its optimum performance, it is crucial to have unrestricted air flow through the system. A dirty or restricted air filter, the blockage of an exhaust air duct, a misaligned heated/cool ventilation module, or incorrect foam installation of the seat cushion or seat back will all have negative effects on CCS operation.
Heated/Cool Ventilation Module
Each heated/cool seat has 2 ventilation modules, one located under the seat cushion and one located in the seat back. These modules are controlled by the climate control seat module (CCSM). Each ventilation module contains a thermo-electric device (TED), a temperature sensor, and a blower motor. The TED and temperature sensor are mounted downstream of the blower motor. Each TED consists of a circuit of positive and negative connections sandwiched between 2 ceramic plates. Each ceramic plate is equipped with copper fins for heat exchange. The air flowing past these fins is either directed as conditioned air into the seat cushion and seat back, or directed into the cabin as waste air.
A TED is essentially a solid state heat pump that is used to heat or cool the air supply to the seat cushion and seat back. When voltage is applied to a TED, one side releases energy as heat, while the opposite side absorbs energy and gets cold. When the polarity of the current flow to the TEDs is switched, the hot and cool sides of the TED reverse.
During the following climate control seat system description and operation, the TEDs, blower motors, and temperature sensors will be referenced independently even though they are all packaged together as a module.
Climate Control Seat (CCS) System
The CCS system consists of two heated/cool ventilation modules and one climate control seat module (CCSM) that controls both the driver and passenger heated/cool seats systems. The CCSM is mounted below the front passenger seat cushion. It receives power from both, battery positive voltage and ignition 3 voltage.
Once a CCS system is activated, cabin air is drawn through the seat blower motors and directed across the fins of each of the thermo-electric device (TED) located under the seat cushion and in the seat back. The air is either heated or cooled as it passes over the TEDs. This conditioned air is then directed through channels in the foam of the seat pad and through small holes in the seat cover to the occupant. Once the system is activated, the CCSM uses a set of algorithms to control the temperature of the selected heating or cooling modes.
Your best bet is to take your vehicle to a qualified repair shop an have it diagnosed .
DTC B19A4: Driver Seat Back Blower Speed Circuit High

DTC B19A8: Driver Seat Back Blower Speed Circuit Short to Ground

DTC B103D: Driver Blower Power Circuit

DTC B272E: Driver Seat Back Blower Circuit Open
DTC B19A3: Driver Seat Cushion Blower Speed Circuit High

DTC B19A7: Driver Seat Cushion Blower Speed Circuit Short to Ground

DTC B2729: Driver Seat Cushion Over Temperature
DTC B19A2: Passenger Seat Back Blower Speed Circuit High

DTC B19A6: Passenger Seat Back Blower Speed Circuit Short to Ground

DTC B111D: Passenger Blower Power Circuit

DTC B272F: Passenger Seat Back Blower Circuit Open
DTC B19A1: Passenger Seat Cushion Blower Speed Circuit High

DTC B19A5: Passenger Seat Cushion Blower Speed Circuit Short to Ground

DTC B272A: Passenger Seat Cushion Over Temperature
Driver and Passenger Heated/Cool Seats Inoperative
  1. Ignition OFF, disconnect the C1 harness connector at the CCSM.
  2. Test for less than 5 ohms between the ground circuit terminal M and ground.
  3. ?‡'
    If greater than the specified range, test the ground circuit for an open/high resistance.

  4. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
  5. ?‡'
    If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

  6. Disconnect the C2 harness connector at the CCSM.
  7. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
  8. ?‡'
    If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

  9. If all circuits test normal, replace the CCSM.


Sorry

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1 Answer

Driver side electric seat is stuck in the far forward position and won't move. How do I move it manually or fix the motor.


Auto Repair: How to Replace a Power Seat Motor - YouTube

? 1:44
https://www.youtube.com/watch?v=EDh-0rs5Fjo
Oct 26, 2010 - Uploaded by automdvideos
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Heated seats


could be that a separate fuse runs the element to heat the seat, or relay. try unplugging the connector under the seat and replug in to see if that fixes it. check for power at the feed side of the loom plug before you replug it to the seat .

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Heated seat not working on 2000 ford expedition eddie bauer


Check continuity on the seat heaters. If that's ok, check the grounds. Check power to the heaters while you are there.

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2 Answers

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I have the same problem with my 03 2500 sierra hd driver seat. lights up for a split second but shuts off. Passenger seat heats fine. Any fix yet?

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If the passenger heated seat still works, the grid went bad in the drivers seat for one relay operates both seat heaters

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1 Answer

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MORE THAN LIKELY THE HEATING ELEMENT HAS MALFUNTIONED. ITS A PRETTY COMMON PROBLEM IN HEATED SEATS

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Identical thing here with my '03 Surburban LT.

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