raywire Posted November 22, 2008 Report Share Posted November 22, 2008 what does the illumination wire do on f900 ? Is it necessary to attach? I have a illumination wire and a dimmer wire on harness for 98 gmc k1500, what is the difference between the two? Quote Link to post Share on other sites
MisFit Posted November 24, 2008 Report Share Posted November 24, 2008 one goes hot when your headlights are on. one will dim when you dim your dash lights Quote Link to post Share on other sites
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