Headlight problem

[Eolafan]

I'm having a problem with my 2009 expedition, at night after starting my vehicle and driving for a very short time with the lights on the headlights first gym and then go out completely but the vehicle otherwise runs fine. My mechanic has replaced the alternator and tells me the battery is just fine. The vehicle runs perfectly other than the headlight problem. Any thoughts?

 

[1955moose]

Could be a ground wire that's barely making connection. Second thing is check all fuses and relays involving the headlights. Pull them check for corrosion on terminals where they make contact. On the relays and fuse swap in another one, to see if it improves.

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[bobmbx]

I'm having a problem with my 2009 expedition, at night after starting my vehicle and driving for a very short time with the lights on the headlights first gym and then go out completely but the vehicle otherwise runs fine. My mechanic has replaced the alternator and tells me the battery is just fine. The vehicle runs perfectly other than the headlight problem. Any thoughts?

How long do they stay on? Do they stay on the same length of time or does it vary? Can you get them back on?

 

[Eolafan]

The headlights stay on for about 5 to 10 minutes and then they tend to dim and eventually go completely out after about 10 minutes.

 

[1955moose]

On top of my earlier post, you may want to test headlight switch, check connector going up to it could be corrosion making it short out as it warms


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