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Old 08-29-2003, 10:06 AM
neileg neileg is offline
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Join Date: Sep 2002
Location: Newcastle upon Tyne, UK
Posts: 215
You could have a bad earth in your rear light cluster. If the running lights are partly earthing through the brake circuit due to a bad earth, they would dim when you light up the brake lights as this will increase the resistance to earth.

Just a thought.
Cheers, Neil
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