Question about 2003 Ford Explorer Sport Trac

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My seat heaters stopped working a few months back. Now the power seat on the passenger side quit. What could be wrong? What parts do I need to order. (It's not the fuse.)

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Check the connectors underneath the seats to see if they are connected and if there is any corrosion in them from moisture damage. Check the engine bay fuses and relays as there could be one for the heater and seat controls in there seeing as how any heating element requires allot of power. Parts can be anything from heater elements to switches to seat motor but without further diagnostics on your end with details here it would be hard to say anything else other than what I have listed.

Posted on May 29, 2011

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Posted on Jan 02, 2017

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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.
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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.
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Does the scan tool indicate that the heated seat sensor parameter is within the specified range?
0.078-4.94 V

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