Seat Heaters not working - 1999 Cadillac Catera

Do both your front seats have heaters ? Do both not work , or just one ? Do the heated seats have heat elements in backs as well as the seat ? The heater grid in the seat go bad !

Check underneath the seat for an inline fuse. It is a glass type fuse in a fuse holder that you have to push and twist to get out.-----------------------------------------------------------------------------
XPROG-M

Ok I don't know who these people are giving advice but I hope they are not gm mechanics. There is a fuse under the hood marked MBEC 1 50amp. If it blows it knocks out both power seats seat heaters and power windows passenger side front and back. I can't believe all this wiring ****!

First off, I would contact your local Jeep dealer and have them run your VIN # to check for any recalls. The 1999-2004 Grand Cherokees had a recall on the seat heaters. If your vehicle doesn't fall into the VIN # range then either your seat heater switch has gone out, or you have a broken element in the seat heater. I have replaced more seat heaters than switchsm the elements heat up and break. Hope this helps out.

Best of luck

Fuse

you need to check the resistance in each of the heated seat elements in the seat. There's a two wire connector under the back of each front seat. The connector should be green. disconnect it and measure the resistance along the circuit going into the seat. if it isnt .1 - .3 ohms, replace the appropriate heated seat element

Like Chris d whiz and FTJoe say, check the fuse in the fuse box first. Seems strange that both seat heater switches would have failed. If the fuse if fine, it is probably bad switches. you can buy replacement seat heater switches from the dealer for about $28 or so each. They are very simple to replace. Just pop off the trim piece around the gear shifter and unscrew the switch and put the new one in place. To pop off the trim piece, start at teh top and work your way toward the back of the car. There are three catches on each side that hold it in place.

I have a 2004 CTS. I know there are two fuse boxes underneath the floor carpeting in front of the rear seat. Remove the rear seat bottom cushion and pull the carpet forward and you will see them. Inside the cover identifies what fuse is for what function. Hopefully it is a blown fuse, otherwise my guess would be a short in the wiring some where.

Check the fuse