Buick heated seat module - 2001 Buick Regal

Doesn't have a fuse for power seats . Use's a circuit breaker , 25 amp circuit breaker PWR SEAT located in rear fuse box . This rear fuse box is under the back seat . Did you look under the seat to see if something is blocking the seat tracks ? Does the vehicle have memory seats ?

None of the heated seats work , driver or passenger ? Maybe just the elements are burnt .

Watch this video on how to test .
https://www.youtube.com/watch?v=Fhd2DPbTjeE

There are bulletins for this. Do ohms test on heating element. The bulletin mentions a couple of codes, B2425 and B2430. The bulletin mentions modules were replaced as a fix and nothing wrong with modules.

You have probably burnt up the element as it is a 17 year old seat now. The elements are replaceable, but the labor is pretty spendy. To test it you will need a multimeter to check for continuity across the connectors that go to the seat heating elements and check for voltage at the car side of the connector. If you have 12v to one side of the connector and continuity to ground at the other side, and do not have continuity to the seat side between the connectors, you know it is a bad element.

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.
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If greater than the specified range, test the ground circuit for an open/high resistance.

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

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

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

Sorry

The module for the heated/cooled seats is underneath the front passenger seat. Buick had a problem with poor contact on the connector plug resulting in a melted connector. The module is mounted to the bottom of the seat and although it's tight, you can remove the two nuts holding it in place and pull it out to the front of the seat to access the connectors (there are 3). I had a burned connector on the biggest connector. I found a replacement connector (12-cavity) and terminals on eBay and just finished wiring the new connector. Results are disappointing because the driver's seat still doesn't work and the passenger's seat doesn't work all the time. Guess it's time to invest in a new module.

The following checks and repairs can help you:
1. In the fuse box within the bonnet - check fuse number 22, if burnt, replace it
2. Check fuse 19 in the fuse box inside the car located under the dashboard on the driverside
3. If these steps don't help, the problem may be with the wiring and connection between the module and the seat cushion - inspect it
4. Check if the signal return on the circuit is adequately functioning - if the module is being informed of an active seat
5. If there is a problem - repair or replace the circuit and/or wiring.

Either the switch itself is bad or the front heated seat module is having an issue.

I have a 2001 and just replaced the fuel pump assembly in the tank because the fuel gauge didn't work or worked irratic. After talking to the partsman it sounded like this was common. The contact for the sensor wears away and looses contact. You will see that the new fuel pump module has different type of metal wiper contact. As for the heated seats, I have an issue with driver side also and haven't had a chance to look into it yet.

There is a module under the seat that is probably bad. The switch does not click or lock down, it activates the module.