Yep post pics. Also of the THS it's self if possible.

I don't think it will be the pendent or the cable it will be the tool height setter thats sending the signal to ground so the controller thinks it's finished.? The pendent just tells the controller to activate the THS routine the controller then monitors the input that the THS is set too. Really the controller should check to see if the input is already high and give an error message saying so.!!

I would check the THS cable and the assembly it's self to see if any metal has got stuck between the pad and the body.? This would send it to ground.