Zetec doesn't have ambient lighting on the Mk3.
Only Titanium and higher...
Not specifically true... Some early Zetecs like mine and the OP's did have the titanium overhead console with sunglasses holder and ambient lighting infrastructure in place.
I wondered if ambient lighting could be activated, and after playing around with the relevant setting in the IDS software, mine was activated and instantly illuminated.
I believe Ford then later changed the Zetec so it only had the ultrasound alarm sensors in the headlining rather than the full titanium goodies!
Sent from my iPad using Ford OC