How off my seat heater - 2001 Jaguar XJ8

Question edited for clarity and toss in some CAPS.
Question moved to model category.

Check the connections to the module and the element. There is help in the forums and videos as well, although not all on the Ford Flex, the idea is the same.

Seat heater doesn't work - Ford Flex Forum

FordFlex.net https://www.fordflex.net > ... > Recalls and TSBs
Apr 19, 2012 - The driver side seat heater for my 2009 Flex stopped working. The dealer says that it is the heating element and is $500 to replace and of ...

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Trying to test my 2009 Ford flex driver side heated seat

JustAnswer https://www.justanswer.com > Ford Repair
Jan 24, 2019 - If the resistance reading of step 2 shows proper value, perform an amperage draw test of the heater elements by applying power to the YE/BU wire ...

1 answer · Top answer: Yes but it would need to be a advanced level one... a basic engine reader only gains access ...
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Ford Flex Seat Heater Control Module - 9U5Z14C724A

Lakeland Ford Parts https://parts.lakelandford.com > Ford__Flex > Seat-He...
Buy Ford Flex Seat Heater Control Module. Seat Heater Control Module - Repair or Replace Has your Seats, Left, CUSHION - OEM Ford Part # 9U5Z14C724A (9U5Z- ...
Rating: 4.8 · ‎3,386 reviews‎

Drivers side seat heater repair and costs - Page 2

My Ford Freestyle https://www.myfordfreestyle.com > forums > viewtopic
Dec 11, 2009 - I checked all connections under the seat. The bottom pad has a 4 wire pin connector and the back has a 3 wire pin connector.

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DEFEAT THE HEATER, AND WHEN THE SERVICE MANUAL ARRIVES FIX IT
just unplug the heater. element end lead.

?€¢
DTC B2430 Passenger Seat Heater Circuit

Do you know what DTC'S - diagnostic trouble code's are ?

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.
Your best bet , take it to a qualified repair shop that has diagnostic scanner that can read this code's

?€¢
DTC B2430 Passenger Seat Heater Circuit

Do you know what DTC'S - diagnostic trouble code's are ?

?€¢
DTC B2435 Driver Seat Back Heater Sensor Circuit

?€¢
DTC B2440 Passenger Seat Back Heater Sensor Circuit

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.

Not a fuse problem , more likely a burnt out element .
CHEVY GMC SEAT HEATER TROUBLESHOOTING YouTube

Your best bet , take it to a qualified repair shop.

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

Do you know what a electronic module is ?
DTC B2425 or B2430
Circuit Description
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 Descriptors
This diagnostic procedure supports the following DTCs:
• DTC B2425 Driver Seat Heater Circuit
• DTC B2430 Passenger Seat Heater Circuit

Do you know what a DTC - diagnostic trouble code is.

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

you probably have a bad relay or a shorted wire somewhere. Bactrack the wiring from the seat to the dash. You may also have a bad fuse.

Hello and welcome. this almost always a bad seat heater element in the seat. the first thing that will need to be done, is have the seat control module scanned for trouble codes. also will need to check the seat heater elements resistances.

When this was happening on my Envoy it ended up being the seat heaters control module that was going out. About $600 a seat on mine. Just wish my repair center found that out before they replaced the seat heaters twice.

Check the fuse