Why my heated seats not working

Question edited for clarity.
Question moved from Spanish Car company 'Seat', pronounced See-At.

Check Fuse 13 (Heated Seats)

https://fuse-box.info/chevrolet/chevrolet-uplander-2005-2008-fuses-and-relay

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1. Blown Fuse: A blown fuse can prevent power from reaching the heated seat system. Check the owner's manual for the location of the fuse for the heated seats and replace it if necessary.
2. Bad Relay: A bad relay may also prevent power from reaching the heated seat system. Check the relay for the heated seats and replace it if necessary.
3. Bad Heating Element: The heating element in the seat may have failed. If this is the case, you will need to have the seat cushion removed to replace the heating element.
4. Loose Connections: Check for loose connections in the wiring to the heated seat system. Make sure that all connections are tight and secure.
5. Control Switch Failure: The switch that turns on the heated seat may have failed. If the switch is not functioning properly, it will need to be replaced.
6. Bad Wiring: The wiring in the heated seat system may have become damaged or frayed over time. If this is the case, you will need to have the damaged wiring repaired or replaced.

this is a copy of your owners manual fuses start on page 565
The instrument panel fuse block access door is
located on the driver's side edge of the instrument
panel. https://www.manualslib.com/manual/1029265/Gmc-Yukon-2007.html?page=1#manual

I don't know model year? So I can't post a diagram. Hopefully your owners manual will show you location of applicable fuses and relay where applicable. Your fuse box cover may have this info. www.fleet.ford.com may have your owners manual Then you check applicable fuse and voltage on fuse circuit. As far as applicable relay, the control side of relay needs voltage and ground, the load side of relay needs voltage.

Click on the comment link to reply.

It Is under the hood in the fuse and relay center. Consult the owner's manual or use the bottom of the lid for ID of fuses.

Wendy, the heated seat relay or switch could be bad, a good tech. may have to run diagnostics on it and locate fault and give estimate for repair. In the meantime instead of unhooking battery, look in your manual and find the heated seat fuse/relay and unplug it, verify seats are not heating up and then leave fuse/relay out until you can have it checked out or try a new relay and see if that corrects your problem. I will post links to your fuse boxes, I believe one in trunk and one under hood. Check the attached links,instruction and guides, Good luck
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http://www.300cforums.com/forums/tech-tips-diy-how/94033-faq-2005-2007-lx-fuse-identification.html
Flashing seat warmer switch

Both front and rear heaters run off different fuses so check the owner's manual for the location of the fuse and replace it. If you don't have the owner's manual a Haynes or Chilton's manual will also have the fuse box diagram and are very useful to own.

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.

check your owner manual for location of fuses and relays. Fuses control low current through the switches and relays control the high current flow to the seat elements. I suspect the fuses are ok, but you might have a bad relay. Relays can be in the fuse panel in the car or under the hood in a relay box.

seats use heavy corrent & use relays instead of fuses. check relays in fuse panel. see chart on cover or owner manual for location.

Also, this is for 96 villager seats.

Circuit Protection
Power is supplied to the seat motors through the 30A POWER WINDOW fuse. The fuse is located in the LH engine compartment fuse junction panel and is hot at all times. The circuit breaker is behind the interior fuse junction panel and prevents current overload and component damage.

go to this site for more help

http://autos.groups.yahoo.com/group/villagerquest/