Chevy and GMC Duramax Diesel Forum - View Single Post - LMM Fog Light Circuit Diagram?
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post #4 of (permalink) Old 02-28-2010, 05:25 PM
cainer70
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Location: Fort McMurray, Alberta/Atikokan, Ontario
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I think what happens is when highbeam comes on it opens ground on the fog relay making the switch inoperable and lowbeam closes ground so it works, some how you have to isolate the fog wiring from the headlights maybe from under the fusepanel im not sure...


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