2005 Buick Terraza Q&A

2005 Buick Terraza Question: headlights dimming or quivering during night driving

A month ago while on a trip the headlights and enterior lighting when out when I turned on the bright lights. Flipped back to normal lights back on, about ten miles they blinked off then back on. Took garage and said a lose wire was found connecting to battery. Suppose to have taken care off. A few weeks ago, noticed the dimming down and or the quivering...during night driving..Happened last two times I was night driving.. -
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