If there is a short in the circuit, from a burned out heating element for example, the relay will cycle on and then off in 3 seconds or so when it detects the short. Could be the steering wheel, but why did the new one fail after one week? Could be the controller, but why did changing the steering wheel get it to work?
Can't wait to hear the outcome of this one. My money is on a defective controller.
2014 Jeep Grand Cherokee Overland, Brilliant Black Crystal Pearl Coat, 3.6 Pentastar V6, Advanced Technology Group