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Park on a level surface and measure and mark 25ft. forward of the truck.

Wait for condition of low light.

Start the truck's engine and turn the headlights on, set to LO beam.

Adjust the headlights so that the brightest part of each beam hits the ground 25 ft directly ahead of the lens (not to the left or right.)

You may need a #2 Phillips head screwdriver to turn the adjusters.

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14y ago

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