If it's connected properly, what else can it do. You'll need someone to watch for movement of the cable I suspect or how else would you know whether...
It's handy that S-Types hardly ever seem to suffer engine problems - apart from the 4.0 needing the right tensioners and the 2.7D with DPF - and when...
If it did, bear in mind the LS was related to the early (pre-2002.5MY) S-Type. It didn't get the many newer things (engines, suspension, ZF gearbox,...