yellow tubes in headlights?

[Tom Sessions]

They are for the lasers mounted in the front of the car no that's not it

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,it's for the auto pilot,no that's not it either

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they are used to aim the headlight's since you can't mount headlight aimers on the lenses.

 

[Hisser]

Seriously, they are for adjusting the headlights, but you must have a full tank of gas according to the service manual and be on a level surface. If you would like a scanned copy of the directions I can scan them out of the manual and send them to you with exactly what you need to do to set them. You have to remove the wingnuts, and there is a little wrench you will need as far as parts are concerned to adjust them. They only move up and down if I remember right. I have not read the manual in a few months. E-mail me if you need to...