We've got a slight niggle with the head lights on our 94 ZX TD - sometimes when you switch them on you don't get full dip, it stays on dim dip, only giving dip when you operate the switch to main beam. My wiring diagram says the dip is fed straight off the switch, but this has got sticking relay written all over it. I replaced the column switch last year (new, gen Valeo jobbie from GSF), so can't believe it's that - although it did seem to improve for a while afterwards
Hopefully it will play ball when the MOT man turns the lights on.....