It was diode P/N YL8Z-10Z912-AA that was bad. There are two in the engine buss, one for the A/C compressor and the other one for the switch chip that recognizes the key.
I did the exact set up about 5 yrs ago (Front/Back) and had no problems whatsoever. The stopping power increased by about 20% and they work like normal OEM. You will need at least 18" wheels.