2000 F150 Headlight Problem
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Senior User
Joined: Jun 2004
Posts: 148
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From: Deep in the heart of TX
2000 F150 Headlight Problem
The brightness level suddenly went down on the left headlight. I replaced the bulb but that still did not correct the problem. I have no idea what might be causing this problem. Any advice would be appreciated.
Lead Driver
Joined: Sep 2006
Posts: 7,907
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Low brightness is low voltage.
A ground issue perhaps dropping to much voltage accross it from the current flowing.
Each side has a seperate fuse so it's not normally a fuse doing this.
At the poor ground point, voltage accross the poor connection goes up as the resistance goes up.
When it approches about half the system voltage or 12/2 = 6 volts the lamp dims from half the voltage it should have..
Good luck.
A ground issue perhaps dropping to much voltage accross it from the current flowing.
Each side has a seperate fuse so it's not normally a fuse doing this.
At the poor ground point, voltage accross the poor connection goes up as the resistance goes up.
When it approches about half the system voltage or 12/2 = 6 volts the lamp dims from half the voltage it should have..
Good luck.
Thread Starter
|
Senior User
Joined: Jun 2004
Posts: 148
Likes: 0
From: Deep in the heart of TX
Low brightness is low voltage.
A ground issue perhaps dropping to much voltage accross it from the current flowing.
Each side has a seperate fuse so it's not normally a fuse doing this.
At the poor ground point, voltage accross the poor connection goes up as the resistance goes up.
When it approches about half the system voltage or 12/2 = 6 volts the lamp dims from half the voltage it should have..
Good luck.
A ground issue perhaps dropping to much voltage accross it from the current flowing.
Each side has a seperate fuse so it's not normally a fuse doing this.
At the poor ground point, voltage accross the poor connection goes up as the resistance goes up.
When it approches about half the system voltage or 12/2 = 6 volts the lamp dims from half the voltage it should have..
Good luck.
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