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My heated seats don't work. can they be repaired?

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  • Cars & Trucks Master
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Hi yes thay can,but first make shore its the seat and not the wire that runs to it.

Posted on May 01, 2015

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Trying to find which fuse is for the heated seats on a 2004 ford explorer sports trak


Heated Seats
This system allows the electrical heating of the front seats on passenger demand.
The components of the system are:
  • the seat heating elements located in the seat cushion and backrest.
  • the heated seat control switch, located on the seat side trim panel.
  • temperature sensors located in the seat cushion heating elements.
  • heated seat relay.
Do both front seat heaters not work ? Do you know how to test electrical circuits with voltmeter ?
PINPOINT TEST J: THE HEATED SEAT IS INOPERATIVE Test Step Result / Action to Take J1 CHECK HEATED SEAT SWITCH OPERATION
  • Key in ON position.
  • Press the heated seat switch on the driver and passenger seats.
  • Are both heated seat switch indicators illuminated?
Yes
If both indicators illuminate, Go To Pinpoint Test K . If only one indicator illuminates, GO to J5 .

No
GO to J2 . J2 CHECK THE HEATED SEAT RELAY CIRCUITS
  • Key in OFF position.
  • Disconnect: Heated Seat Relay C3250 (located under the driver seat).
  • Key in ON position.
  • Measure the voltage at heated seat relay C3250-86, circuit 1003 (GY/YE), harness side and ground; and between C3250-30, circuit 566 (DG), harness and ground.
    s5r~tr~en~file=a0078817.gif~gen~ref.gif
  • Are the voltages greater than 10 volts?
Yes
GO to J3 .

No
REPAIR inoperative 1003 (GY/YE) or 566 (DG) circuit. TEST the system for normal operation. J3 CHECK HEATED SEAT RELAY GROUND CIRCUIT
  • Key in OFF position.
  • Measure the resistance between heated seat relay C3250-85, circuit 57 (BK), harness side and ground.
    s5r~tr~en~file=a0078818.gif~gen~ref.gif
  • Is the resistance less than 5 ohms?
Yes
GO to J4 .

No
REPAIR circuit 57 (BK). TEST the system for normal operation. J4 CHECK THE HEATED SEAT RELAY
  • Install a fused jumper lead between heated seat relay 3250-30, circuit 566 (DG), harness side and heated seat relay C3250-87, circuit 1064 (YE/LB), harness side.
    s5r~tr~en~file=a0078819.gif~gen~ref.gif
  • Do both heated seat indicators illuminate when pressed?
Yes
INSTALL a new heated seat relay. TEST the system for normal operation.

No
REPAIR circuit 1064 (YE/LB) to switches. TEST the system for normal operation. J5 CHECK INOPERATIVE HEATED SEAT SWITCH INPUT
  • Key in OFF position.
  • Disconnect: Heated Seat Switch C320 (Driver) or C321 (Passenger) for the inoperative heated seat.
  • Key in ON position.
  • Measure the voltage between heated seat switch C320-2 (driver) or C321-2 (passenger), circuit 1064 (YE/LB), harness side and ground .
    s5r~tr~en~file=a0078820.gif~gen~ref.gif
  • Is the voltage greater than 10 volts?
Yes
GO to J6 .

No
REPAIR circuit 1064 (YE/LB). TEST system for normal operation. J6 CHECK CIRCUIT 57 (BK) FOR AN OPEN
  • Measure the resistance between heated seat switch C320-4 (driver) or C321-4 (passenger), circuit 57 (BK), harness side and ground.
    s5r~tr~en~file=a0078821.gif~gen~ref.gif
  • Is the resistance less than 5 ohms?
Yes
INSTALL a new heated seat switch. TEST the system for normal operation.

No
REPAIR circuit 57 (BK). TEST the system for normal operation It's not that simple , being a fuse . It's probably the relay or the heating element .
PINPOINT TEST K: SEAT DOES NOT HEAT BUT THE HEATED SEAT INDICATOR ILLUMINATES WHEN PRESSED ? Does it ?
Your best bet would be to take to a qualified repair shop .
Do

Jun 29, 2016 | 2004 Ford Explorer Sport Trac

1 Answer

Both heated seats and mirrors don't work


Not exactly.
According to the wiring diagrams, the heated seats are controlled by several fuses and two modules, plus two relays, along with input from the HVAC module. There is a module and a relay for each seat heater.
The mirrors are controlled by several other fuses and modules.
You may need a shop manual to trace the circuits.
All of the fuses involved are in the box in the engine compartment.

Sep 19, 2012 | 2005 Ford F 350 Super Duty

1 Answer

Where is the fuse for the heated seats in a 2007 jeep grand cherokee laredo?


Remove the ignition key. Unplug the HSM (heated seat module). It is under the passenger seat. You can easily accomplish this with the seat all the way back. Wait a few seconds they plug it back in. Start the engine. Turn the seats on. If the indicator lights come on for 2 seconds and then go out, further diagnostics is required. Hopefully they'll stay on and the seats will be working fine.

Thanks,
Ron

Feb 12, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Heated seat not working


The most common cause of this is that the electric heating grid in the seat is defective. To repair this the seat must have the cover removed and a new grid installed, you will likely need to replace the control switch at the same time, also look under the seat and make sure no wiring is damaged on the seat support springs and shorted to ground. The de-trimming (removal of seat coverings) is best left to automotive trim shop as removing and installing a seat cover is a real pain if you don't have the correct tools and skills to remove the retaining clips that hold the cover to the frame, they are called "hog rings".

Nov 15, 2011 | 1992 Volvo 740

1 Answer

My 2004 Chevrolet 3/4 ton truck heated seats come on without turning on the switch. Is there a fuse or a wire I can disconnect? It is 108 degrees here in Austin, TX. I don't need heated seats. Thanks


THEIR SHOULD BE A MODULE UNDER THE SEAT TO UNPLUG .THEIR HAS BEEN PLENTY OF PROBLEMS WITH THIS HEATING ISSUES SOME WORK SOME DONT .MAYBE TAKE THE DOOR PANEL OFF AND UNPLUG THE SWITCH FROM THE BACK SIDE

Aug 05, 2011 | 2004 Chevrolet Silverado 2500HD

2 Answers

Heated seats in 2007 Lincoln MKX not working. I puch the button to turn them on and they light up for a second then go off. What would be the cause and solution. If it was a major problem would effect...


Help anybody?
I have a 2010 Lincoln MKX with heated and cooled front seats. However, when I try to turn them on (85% of the time) they don't work. Primarily when it's cold the heated seats won't stay on... The light turns on for a fast count of 1-5 and then turns off. This has happened since the car was new and I've had it into the dealer 4 times to have it fixed (with no resolve). In their defense they suggest it's fixed each time because they test the heated seats when the vehicle is warm in the shop. Unfortunately, this is nearly the only time it stays on.
I would love to recommend a suggested fix to the dealer as they don't seem to be able to repair it... Any ideas???

Mar 14, 2011 | 2007 Lincoln MKX AWD

1 Answer

Heated seat not working. light gos on but no heat.


usually the heating element under the seat cover.seat must come out to repair. it can be done, but bring your lunch.find the plug under the seat, check for power and ground , and if those are present, remove seat, remove cover, and replace the seat heater. it's a pad that goes under the regular seat cover. good luck!

Dec 19, 2010 | 2002 Buick LeSabre

2 Answers

I have a 2004 Chevy Silverado. The heated seat on the drivers side does not work. When you push the button to turn it on, the lights come on briefly then turn off.


Would you say it stays on about 30 seconds and does the passenger side do the same thing? If possible retrieving the codes will narrow down the search for a correct solution.If the passenger side is ok we may be able to eliminate the passenger side as bring part of the problem.Please advise so will know which way to go with your solution.


Condition/Concern:
Driver and passenger heated seats inoperative or shut off in 30 seconds. There will be DTCs B2435, B2440, B3606 and/or B1825 set in the Drivers Seat Module. The adjustable pedal position sensor, seat recliner position sensor and both heat seat thermistors share the same 5 volt reference internal to the Drivers Seat Module. A fault in any of these components/circuits can make the heated seats inoperative or shut off in 30 seconds, as well as, the seat recliner and/or adjustment pedals may move in short increments when operated. A fault in heated seats, adjustable pedal or seat recliner will affect BOTH heated seats.
Note:: Even if the vehicle is not equipped with adjustable pedals DTC B3606 still may set.


To help isolate the area of concern use the Tech 2 or a comparable scanner and go to "Sensor Data" in the Drivers Seat Module. Monitor the following parameters for being out of range:
Recline Position- Normal range .39V-4.58V
Pedal Position (if equipped) - Normal range .39V-4.58V
Psgr. Seat Heat Sensor- Normal range 1V-4V
Drvr. Seat Heat Sensor- Normal range 1V-4V
If a parameter is found to be out of range inspect circuits for any opens, shorts to ground, or voltage. If none found replace the suspect component.

Please be aware of the following common areas of concern:
  1. The adjustable pedal position sensor internally shorted pulling the 5 volt reference low. Disconnect the adjustable pedal position sensor and see if the heated seats start working correctly, if so replace. Note Important:: The APP (Accelerator Pedal Position) sensor is NOT the adjustable pedal position sensor. Make sure the correct sensor, adjustable pedal position sensor, is disconnected.
  2. The seat recliner position sensor internally shorted pulling the 5 volt reference low. Disconnect the recliner position sensor and see if heated seats start working correctly, if so replace.
  3. An open in either heated seat thermistor circuits (signal or low reference). The most common is the passenger thermistor where it passes through seat connector C305 pin "L" or "K" or C399 pins "R" or "G".
  4. A chaff to ground on either heated seat thermistor signal circuits. The most common is circuit 5475 black/red or dark blue shorted to ground in the passenger seat near the buckle. Note Important:: The heated seat thermistors act differently to "OPENS and SHORTS" than the adjustable pedal position sensor and seat recliner position sensor. The adjustable pedals and seat recliner sensors can be disconnected for testing of the heated seats. Where as the heated seat thermistor circuit must be working correctly before EITHER heated seat will operate. Disconnecting one thermistor, which may have a concern will not allow the opposite heated seat to work correctly, BOTH side must be operational before EITHER heated seat will operate.
Clearing DTCs
If DTCs will not clear when using the Tech 2 or comaparable scanner after a repair has been made, try operating the device in which the repair was made. Example, if a repair was made to the passenger heated seat thermistor circuit, the DTCs may not clear unless the passenger heated seat is operated.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

Nov 17, 2010 | 2004 Chevrolet Silverado 2500HD

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