Hi Dean
To use the timer alone, an extra loom is required.
TBH I dont think I could be any further help here - yp53 already has the loom, timer and T80 kit fitted - the 1533 just happened to come with the T100 (which has the right loom and connector for the timer).
I do know others have retrofitted timers & remotes....hopefully someone can point you to the right post
cheers
simon