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Hi Colin,
The year car you're working on makes a bit of a difference because on the 68-72 cars the headlight door and wiper door systems are interconnected.
Have you gone as far as to check that there's a vacuum supply to the relays, that all the parts and hoses are installed properly, and that you can cycle the doors by hand without interference?
Regards,
Alan
Hi c,
The headlight mechanism operates like an 'elbow' joint.
When the lights are up the elbow 'locks' so the lights don't bounce while the car is driven.
Reach your hand up through the opening in the lower valance panel on each side and pull forward and down to release the 'lock'.
DON'T pull on the plastic switch that's also at that point or you'll break the switch.
When that 'elbow' is released the light will swing closed.
It sounds to me like you need to get a complete list of the headlight vacuum parts so you can take a look at what you have and determine what's missing.
Good Luck!
Regards,
Alan
The horizontal 'rod' with the springs attached pulls forward and down.