Headlight wiring
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Trailering
Joined: Nov 2013
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Headlight wiring
2020 F-250 Lariat with halogens. I was changing out the stock bulbs for the Sylvania Ultras and did not pay attention to the wiring harnesses. One of the plugs has a grey sheath and the other is black. Which of those goes to the top bulb in the assembly? Or does it matter? Thanks.
Lead Driver
Joined: Oct 2014
Posts: 5,945
Likes: 1,359
From: NY/Canada border
Too late now because you've already done the job. But I've swapped bulbs many times on a 6.2 and there's no need to remove the grille. At most, the washer tank filler neck and air breather snorkel. Got so I could do all 4 bulbs in about 15 minutes.
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Trailering
Joined: Nov 2013
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You are correct and that’s what I did. The passenger side is easy after you get the air filter box out of the way. The drivers side lower bulb is a bear to reach. I was in a hurry and didn’t note which connector went where though. Sigh.
Fleet Mechanic
Joined: Oct 2012
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From: NorCal
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Trailering
Joined: Nov 2013
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The connectors are exactly the same (H13) but one bundle is wrapped in black sheathing and the other (top) is wrapped in grey. The side marker and turn signal bulb connectors are different. Can’t mess those up.
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Lead Driver
Joined: Oct 2014
Posts: 5,945
Likes: 1,359
From: NY/Canada border
Even on my 7.3 with dual batteries I did it by removing the washer tank filler neck on the driver side, and the whole airbox will pull out on the passenger side after disconnecting the tube that connects breather to intake.
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