Alan I'd start looking for a popped relay chap, the clicking sound is a dead giveaway for a faulty relay. If you have the owners manual, check it out for the location of the relays, get a mate to pop a finger on the relay(s) as you power the lights up and you should be able to narrow the search...

Bit late finding you, just got rid of a blown 1.8 freebie, learnt the hard way about ird's and VCU's ha, looking to replace it with a later model TD4 in the near future, glad I found you, glad to be a part of the forum Regards Dave