[Majortom84]

Thanks for the reply,

I'm pretty certain that it's coming from the driver's side, although I've heard there's a method of 'spraying soap' on the belt's to find out (?).

The wire is wrapped in metal, (runs from the driver's side headlamp to the firewall - lights work fine though) not as thick as battery cables - each end has a plastic connector, three prong - not sure if it's supposed to be like that, from the dust on it, looks like it's always been like that.