XF725, it's my understanding that even pulling the fuse # 17 & 18 dosen't completely shut the traction control off.
I had to disconnect the "center" wire on the ECU to totally disable the TC, but it also eliminates the anti-lock brakes as well.
As far as I know, only the 2004 6 spd Crossfires can get away with this procedure with no other ill effects.
I don't recommend that you do it, so if you choose to do so, it's at your own risk.
I had to do it, because my car had an overly sensitive TC and the slightest wheelspin would put my car into "limp mode". So you can imagine the dangerous situations I got myself into more than once while pulling out into on coming traffic.