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Not my seat but one I received for free after he replaced his faulty seat with a new (used) one. It's in otherwise great condition except for the fact that the heated part of the seat doesn't work. Before failure the heating element got really hot and then never came back on. There is a short somewhere because the heated seat switch yellow LED is always on if you have the seat plugged in, but goes to full brightness if you turn it on but to no avail as it's fried. I looked under the seat and saw this:
The controller is fried! Has that ever happened to someone else, and did you have any luck just changing out the box? Since the there was a lot of heat introduced to the element I'm not sure if I should just replace it too also because it may have contributed to this mess.
Not my seat but one I received for free after he replaced his faulty seat with a new (used) one. It's in otherwise great condition except for the fact that the heated part of the seat doesn't work. Before failure the heating element got really hot and then never came back on. There is a short somewhere because the heated seat switch yellow LED is always on if you have the seat plugged in, but goes to full brightness if you turn it on but to no avail as it's fried. I looked under the seat and saw this:
https://www.lexuspartsnow.com/parts/...501-05010.html
Disconnect the seat connector pictured in your post. Turn on acc.with ignition. Find out which wires are on constant for seat with a 12 volt tester. Identify them. Identify the unpowered ones. Turn seat heat switch on. The two wires that now have 12 volts are the feed to the seat heater. Apply 12 volts to identified 2 heater wires coming from chair. If chair heater works then your seat is obviously good. That connector of course needs changing, or hard wire it directly.
The controller is fried! Has that ever happened to someone else, and did you have any luck just changing out the box? Since the there was a lot of heat introduced to the element I'm not sure if I should just replace it too also because it may have contributed to this mess.
volt tester. Identify them. Identify the unpowered ones. Turn seat heat switch on. The two wires that now have 12 volts are the feed to the seat heater. Apply 12 volts to identified 2 heater wires coming from chair. If chair heater works then your seat is obviously good. That connector of course needs changing, or hard wire it directly.
I replaced the module and the connector was also burned so I used the harness I got from the scrapyard and re-pinned the connector. The modules are the same for passenger and driver and it was a straight-forward install. The heater wires on my car and on a friend's 2006 RX400h both read around 2.1 ohms of resistance, so we'll see how it holds up. So far it's working great with just a new module! None of the wires/pins were damaged, just the plastic housing of the connector and the module itself.
05-18-23, 10:24 AM
Driver Side Heated Seat Fried
