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Our PRM or LUX controls have built in diagnostics that assist in determining the failure mode of our seat heater systems. Please note the flash rates on the switch and what they mean.
LED Flashing: Light off more that on, means the heat sensor circuit is not functioning, (IE: Open circuit in the cushion element green and grey wire assembly). This normally means a pin is not seated in the connector properly and therefore is not making contact with the mating socket. There could also be a break at the solder points where the sensor lead wires are soldered to the green or gray hook up wires.
LED Flashing: LED on more than off, means the heating wire circuit has a break in it and the power is not flowing through the heating elements. This could be caused by a break in the heating wire, a pin pushed out or not seated properly in the connector. Also, bad ground or low voltage output from power source (IE: Smart Fuse Box)
If a short circuit occurs in our heating elements and the installer did not use a fused power feed to our system then the LED will flash on more than off until the short is removed. Note the seat heaters will not work in this mode.
If the Luxury kit is only working in low and not high, this usually means that the orange wire is not connected to the switch.
Note: the power must be disconnected from the control to reset the system and clear the flashing fault signals.
This can be achieved by turning off the ignition of the vehicle if the seat heater system is connected to switched ignition power or by disconnecting the power harness from the controller.
-Check Corp. Forum Admin.
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