The 4 headlight Grille

[hansbuscher]

Hello All. My '72 D100 has a '79 grille. The wiring is kind of hacked in and I'm not sure what the headlight arrangement is. Which are the low beams and are all 4 illuminated in high?
Thanks
-ahb

 

[LocuMob]

I believe the top bulbs were the low beams, I want to say all four go on when you hit the brights. It's been a while since I was in one.

 

[hansbuscher]

Thanks for the info. So many ways to get it wrong.