Heated seat wont come on - 1999 GMC Jimmy

Please don't type in all CAPS, it is considered SHOUTING and is very hard to read.

It is a simple circuit, a fuse, a switch, a relay and the heating element. The most likely reason is a faulty element on one of the seats.

https://www.google.com/search?q=2010+FORD+TAURUS+LTD.+HEATED+DRIVER+AND+PASSENGER+SEATS+WONT+STAY+ON

..

alldatadiy.com

The problem lies in the drivers side seat, the heating element for the back of the seat or the seat heating element has an open or shorted circuit. the part from ford will run you about $150.00 dollars.

Find and check the connectors under the seat for looseness, sometimes these get knocked loose by items pushed under the seat.

Then check the resistance between the connectors going to the seat with a multimeter. They should read something - it they don't the heating pads are shorted (broken).

Then check the voltage at the connector going to the seat with the car and seat heat switch on.

This should tell you where the problem is, please post results here.

The heated seat relay has gone bad for sure on yours if the elements are good. Its highly unlikely both would burn out the same time

the temp regulator is at fault.

check button swap with other seat to try check fuses,and wiring connections to seat under it

have you checked your fuses

this is a common problem if you use the seat heater alot.one or both of the seat heater elements will have burned up or broken.where i live it is very cold most of the time and i have replaced hundreds of the seat heater elements.it is rare for it not to be one or both of the elements.

i put new cars to gether an if it doesnt hav the acessories it wont have the harness u need,,maybe sumtymes they do but if ucan run aseperate switch itll work use the right amp rated wire or ull have more heat (fire)?thats about 12feet of wire they can save they will save if possible(wire harness) too bad i cant fix my own car thou,,,lol..