Question about Jeep Grand Cherokee
Neither heated seat is working the buttons don not light up and the seats do not heat.
Remove the ignition key. Unplug the HSM (heated seat module). It is under the passenger seat. You can easily accomplish this with the seat all the way back. Wait a few seconds they plug it back in. Start the engine. Turn the seats on. If the indicator lights come on for 2 seconds and then go out, further diagnostics is required. Hopefully they'll stay on and the seats will be working fine.
Posted on Sep 16, 2013
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Posted on Jan 02, 2017
Fuse # 20, located in the Junction Block (interior, drivers side). This is a ten amp fuse.
Read the information at the above site. The TSB (technical service bulletin) may be of interest to you.
Posted on Nov 20, 2008
Ok it is obvious since the light is coming on you are getting power to the switch. It could be a heated seat relay. Im fairly sure jeeps use a relay after the switch that is where I would start. Check and see if the Heated seat relay, and fuse are good
Posted on Dec 11, 2008
SOURCE: heated seats
Likely, the heating element in the seat has failed. The reason is simply that the drivers seat is in use more than any other seat in the vehicle. You can check continuity of the element with an ohmeter across the seat side of the heater connector. Check for power at the harness side with a volt meter. If there is power but no continuity, heater element has failed. Personally, I'd probably just live with it but you can either attempt to install a new heater element or if you can find a similar seat in a salvage yard, just buy it and put it in! (whole seat probably costs less than the element!!!
Posted on Dec 22, 2008
C1 & C2 in your panel are most likely one of the culprits, if no power at heater at seat. Sounds like testing for power at seat switch is easier to do than get at these circuit breakers in the panel. If you have power at switch at seat, then it's not the fuse/circuit breaker. Good reading at this link for you.
Posted on Dec 29, 2008
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