Ash's 2004 Patrol GU III TD42ti

[Cuppa]

Thanks @Cuppa
It almost drove me crazy trying to work out how to do it and I burnt out the first dimmer I got from the wreckers so had to go back for another one, but worked it out in the end.
Apart from the relay component its actually simple to wire up.

@Cremulator I'll have to invite you up to Ballarat for a weekend when we eventually return home!