Headlights not working on low beam??

Gday,
5.30 am, driving down same winding dirt road I have been every day for a month or so now and notice a plastic/electrical burning smell. Had just dipped the lights a couple of times for on coming traffic. Was that time of day when the lights aren't doing much but the sun isn't light enough yet. Didn't notice till I was nearly at work, but the only light coming from the front of the car was from one of the driving lights (one must have been blown-hadn't noticed it either).

Get home tonight, ring my auto elec father in law for some help. He says he's had the exact same thing happen to his 75 series ute (mine is a 75 series troopy) and his camry!! Aparantly Toyota wire their headlights in the cruisers in a fairly crappy way. Heaps of currnet runs through a fairly long run of wire and the connection under the column melts/dies eventually. Pull the connection under the steering column as this is where the problem was in both his vehicles. The connection fails in the join and it's just a matter of bypassing the connector. Problem, mine is perfect, looks in perfect nick. I gave it a spray, wiggled it around etc no change. Head light fuses were fine forgot to mention.

Funny thing is the blue high beam light comes on when you turn the head lights on but no lights, push the stalk forward for high beam and they work!! No low beam though??? I'm out of ideas (didn't have many to start with). Anyone with same vehicle know what the go is here? Theres power at the back of the lights when you turn them on but no go which I'm told means the problems in the switching/a relay somewhere?
Thanks for any help
Matt