Question about 2004 Ford F250

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Seat heater does not work. Control light is on but no heat. I think it needs a new heating element, is this hard to fix, where should I purchase it?

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Check you're fuse first don't change anything with out checking you're fuse and heating element connector.good luck

Posted on Aug 30, 2010

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Porche cayene 2006 side passenger heat doesn't work


Hi,
Many seat heaters are either controlled by a fuse, switch and/ or relay. You may need to check whichever of those you may have the skill to do. If the LIGHT on the heater switch is working you can probably rule out those 3. Likely the 'heater elements' (usually thin wires than run under the seat's cover that heat up when voltage is applied, which then heats the seat) have a crack in them somewhere, which needs reconnected.

Also, does the power control work on the passenger seat? If not, it may share a circuit/fuse w/the heater switch.

GL,
TD

Dec 15, 2016 | 2006 Porsche Cayenne

1 Answer

Seat heater comes on by itself in 2004 yukon denali


Heated Seat Components
The heated seat system consists of the following components:
• Driver and passenger heated seat switches
• Driver and passenger seat back heater elements
• Driver and passenger seat cushion heater elements
• Driver and passenger seat back temperature sensors
• Driver seat module
• Driver door module
• Passenger door module
When there are modules involved in the operation of any componet that's acting up , the module's electronic's could be the culprit ! But without testing who's to say what the problem could be !
I would have it check for DTC'S
DTC B2425 or B2430
The driver and passenger seat heaters are controlled by the driver seat module. Power is supplied to the driver seat cushion and back heater elements through individual voltage supply circuits. Power is supplied to the passenger seat cushion and back heater elements through a common voltage supply circuit. All of the driver and passenger seat heater elements are grounded by the driver seat module through individual low side drive control circuits. The heater element control circuits are pulse width modulated to ground by the driver seat module in order to control the seat temperatures by regulating the current flow through the heater elements.
DTC B2435 or B2440
The driver seat module relies on inputs from thermistors installed in the driver and passenger seat backs to control heated seat temperatures. The thermistors are 2-wire sensors supplied with a 5-volt referenced signal circuit and low reference circuit from the driver seat module. Resistance through the thermistors varies with temperature causing the heated seat sensor signal circuit voltage levels to decrease as the seat back temperatures rise.
Install a scan tool.
Start the engine.
Turn the heated seat ON.
With a scan tool, observe the Heated Seat Sensor parameter in the data list for the driver seat module.
Does the scan tool indicate that the heated seat sensor parameter is within the specified range?
0.078-4.94 V

Dec 08, 2016 | GMC Yukon Denali Cars & Trucks

1 Answer

2004 GMC Sierra drivers side seat heater turnes on and off by itself


The seats are powered by a 30amp breaker which includes the circuits for the power motors.
The signal from the control switch goes to a door module then to a memory seat module, then to the heater elements.
It may be easier to disconnect the heating element for now, repairs will need a shop manual to test and trace the circuits.

Apr 29, 2013 | Cars & Trucks

1 Answer

Heated seats do not work


First off, I would contact your local Jeep dealer and have them run your VIN # to check for any recalls. The 1999-2004 Grand Cherokees had a recall on the seat heaters. If your vehicle doesn't fall into the VIN # range then either your seat heater switch has gone out, or you have a broken element in the seat heater. I have replaced more seat heaters than switchsm the elements heat up and break. Hope this helps out.

Best of luck

Jun 16, 2010 | 2001 Jeep Grand Cherokee

1 Answer

My power seat stopped working in my 2003 Yukon XL. The heated seats stopped working as well.


Try this remove the ckt breaker for the power seats the ckt breaker is located in the fuse box inside down by the drivers left foot. leave breaker out for about 10 seconds then reinstall it and see if the seat starts moving. If it does there is a reprogram for this and needs to be done by a dealer or someone who has access to be able to reprogram your vech.
several things could cause your heated seats to not work. If the seat and heated seat seat stopped at the same time could be the reprogram could fix it. If the heated seat quit working at a differant time it could be the seat heater element. get a schematic of the heated seat and ohm the wires for the element. If either element tests open then the element will need to be replaced. You might as well replace both of them at the same time since the seat covers have to come off to replace the seat heaters.(back and bottom ) If one element is bad then both heaters quit working.

Feb 20, 2010 | 2003 GMC Yukon XL

2 Answers

FRONT HEATED SEATS


you need to check the resistance in each of the heated seat elements in the seat. There's a two wire connector under the back of each front seat. The connector should be green. disconnect it and measure the resistance along the circuit going into the seat. if it isnt .1 - .3 ohms, replace the appropriate heated seat element

Jan 04, 2010 | 2004 Cadillac Escalade

1 Answer

Bottom portion of passenger heated seat not working, but the back heated cushion is working normally. The lights for the seat warmers in both activation switches are illuminated when selected.


It sounds like the heating element is broken. Unfortunately they don't usually tell you that if you have heated seats, kneeling or stepping on them, even briefly (as if you were leaning in to get something from the car), or putting something heavy with a firm edge (like a heavy box), can sometimes break one or more of the wires in the heating element. I'd be willing to bet that this is what has happened. The heating elements in the seat are wired together, so it's not a case of having a heat control module for the cushion dying while the one for the backrest is OK. If the whole seat stopped heating, I'd think about looking into the controls for the seat, but with part of it still working, it's likely that the cushion heater has been damaged and will have to be repaired or replaced.

Dec 16, 2009 | 2004 GMC Sierra Denali

2 Answers

The driver seat heater just quit. all fuses are good. how do you tell if the relay is good?


Swap it with a relay you know to be good and see if it works again,pick a relay that is not important to the function of your car.

Nov 01, 2009 | 2004 Cadillac SRX

1 Answer

Heated leather seats will not heat up. Switch lights up and all fuses are okay. Is there a hiddedn relay I am not finding? Is there a quick way to determine if the problem is in the heating element under...


are you saying neither the heated seat cushion nor heated seated back on either seat works? But the light or lights does work?

Please rate as solved if this helps you. It took some time to dig all this stuff up. Please report progress.

Here's some info to start you off:

  • The heated seat is inoperative — seat does not heat but the heated seat switch illuminates when pressed
  • Circuitry.
  • Heated seat module.
  • Seat heater and temperature sensor.
  • Seat back heater.
  • Heated seat switch.


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May 28, 2009 | 1999 Ford Expedition

1 Answer

2002 Grand Cherokee Heated Seats don't work


I will post it in 2 different posts because its too long DB

HEATED SEAT SYSTEM
Individually controlled driver and passenger side electrically heated front seats are available factoryinstalled optional equipment on this model, when it is also equipped with the power seat option. The heated seat system allows both the driver and the front seat passenger the option to select one of two seat heating ranges, Low or High, or to turn the individual seat heaters OFF using the heated seat switches located in the center lower bezel near the bottom of the instrument panel center stack. The heated seat switch circuit operates on ignition switched battery current supplied through a fuse in the junction block, only when the ignition switch is in the ON position.

The heated seat system consists of the following components
  • Heated seat elements
  • Heated seat sensors
  • Heated seat module (or memory heated seat module)
  • Heated seat switches.
The heated seat system also relies upon resources shared with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) data bus network. The PCI data bus network allows the sharing of sensor information. This helps to reduce wire harness complexity, internal controller hardware, and component sensor current loads. At the same time, this system provides increased reliability enhanced diagnostics, and allows the addition of many new feature capabilities. For diagnosis of these electronic modules or of the PCI data bus network, the use of a DRB scan tool and the proper Diagnostic Procedures are recommended.

The electronic modules that may affect heated seat system operation are as follows:
  • Body Control Module (BCM) - Refer to Body Control Module in Electronic Control Modules for more information.
  • Heated Seat Module (HSM) - Refer to Heated Seat Module in Electronic Control Modules for more information.
  • Memory Heated Seat Module (MHSM) - If the vehicle is equipped with the Memory System, refer to Memory Seat Module in Electronic Control Modules for more information.
Refer to Power Seats Premium I/III in the Contents of Wiring Diagrams for complete circuit diagrams. Following are general descriptions of the major components in the heated seat system.

The heated seat system will only operate when the ignition switch is in the ON position, and the surface temperature at the front seat heating element sensors is below the designed temperature set points of the system. The heated seat system will not operate in ambient temperatures greater than about 41 °C (105 °F) . The front seat heating elements and sensors are hard wired to the Heated Seat Module (HSM) or the Memory Heated Seat Module (MHSM).

The heated seat switches are hard wired to the Body Control Module (BCM). The BCM monitors the heated seat switch inputs, then sends heated seat switch status messages to the HSM or MHSM over the Programmable Communications Interface (PCI) data bus. The HSM or MHSM contains the control logic for the heated seat system. The HSM or MHSM responds to the heated seat switch status messages, ignition switch status messages, and the front seat heating element sensor inputs by controlling the output to the front seat heating elements through integral solid-state relays.

When a seat heater is turned ON, the sensor located on the seat cushion electric heater element provides the HSM or MHSM with an input indicating the surface temperature of the seat cushion. If the surface temperature input is below the temperature set point for the selected Low or High heated seat switch position, the HSM or MHSM energizes the integral solid-state relay, which supplies battery current to the heating elements in the seat cushion and back. When the sensor input indicates the correct temperature set point has been achieved, the HSM or MHSM de-energizes the solid-state relay. The HSM or MHSM will continue to cycle the solid-state relay as needed to maintain the temperature set point.

The HSM or MHSM and the seat heater elements operate on non-switched battery current supplied through the power seat circuit breaker in the junction block. However, the HSM or MHSM will automatically turn OFF the heating elements if it detects an open or short in the sensor circuit, a short or open in the heating element circuit causing an excessive current draw, or when the ignition switch is turned to the OFF position.

See the owner's manual in the vehicle glove box for more information on the features, use and operation of the heated seat system.

I WILL POST THE REST

Jan 31, 2009 | 2002 Jeep Grand Cherokee

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