The headlights on my 1990 Ford F-250 were looking pretty bad. 28 years of sun does a number on plastic. Besides the fading and clouding, the housings were broken, so it wasn’t worth just restoring the headlights. If you want to replace your headlights, here’s a guide.
Open the hood and disconnect and/or remove the bulbs from the headlights.
Remove the plastic cover over the top of the headlights and grille by removing the 13 plastic pins.
Unscrew the center and then pull the rest out.
Remove the grille by squeezing the four tabs at the corners from the rear. There may also be a screw holding it on.
Now that the grille it out, it’s time to remove the headlights.
On the inside of the core support, towards the outside of the truck, remove the two nuts on studs going into the headlight assembly.
Towards the center of the truck, from the front, remove the two nuts.
The two nuts are screwed onto this piece.
Remove the bolt.
The headlight assembly should now pull right out of the truck. There’s a huge difference between a brand new headlight and a nearly 3-decade-old one.
My truck, and possibly yours, now has a new set of eyes! Looks so much better than the old ones.
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-Dan
Mechanical Malarkey 
Thanks for the description. It took me a while to figure out how to achieve the step involving the removal of the grill, though. I finally found that a shorty screwdriver could be used to gain some leverage on the tabs on the back side of the grill.
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Glad it was helpful. Some steps are hard to describe with text and pictures, but I’m glad you were able to figure it out.
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How do you align the new headlights? Dim setting looks crosseyed. High setting appears to be OK.
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