Headlights dimming...
Laughing Gas
Joined: Jul 1999
Posts: 1,048
Likes: 22
From: Lacey, WA
Headlights dimming...
Hi,
When you say that they "blink" do you mean they do this in relation to engine RPM? Or all by themselves?
The lights changing intensity generally does not indicate a battery problem but more an Alternator or Voltage regulator problem. I bet the lights do not "blink" when turned on but with the engine off. If so then I would look for a connection problem.
Do the lights brighten when you increase the idle speed? A little may be normal. You can take your Alternator to a parts house and have it checked, usually for free.
Good luck,
Lee
When you say that they "blink" do you mean they do this in relation to engine RPM? Or all by themselves?
The lights changing intensity generally does not indicate a battery problem but more an Alternator or Voltage regulator problem. I bet the lights do not "blink" when turned on but with the engine off. If so then I would look for a connection problem.
Do the lights brighten when you increase the idle speed? A little may be normal. You can take your Alternator to a parts house and have it checked, usually for free.
Good luck,
Lee
Post Fiend
Joined: Apr 2002
Posts: 7,157
Likes: 1
From: Central Kali
Headlights dimming...
Put a voltmeter on the battery and see if the voltage is changing there. Also see if the fan belt is tight enough. I have seen them slip a little when the lights are turned on.
New User
Joined: Apr 2002
Posts: 10
Likes: 0
From: MormonVille
Headlights dimming...
My 1969 F250 was doing the same thing. I had the electrical system checked out and found the voltage regulator was bad. Bring your truck to a place like Autozone or Checker /CSK and they should have a machine they can check it for free
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