Rene Fink Posted February 10, 2017 Share Posted February 10, 2017 (edited) I have a Mack truck with erratic signal light. The 4 way flashers come on when we try to signal right or left. At times the two outside marker lights above the cab start to flash. This problem comes and goes. Edited February 10, 2017 by Rene Fink Quote Link to comment https://www.bigmacktrucks.com/topic/48694-signal-light-problems-2012-mack-gu813/ Share on other sites More sharing options...
41chevy Posted February 10, 2017 Share Posted February 10, 2017 Sounds like it's feed back from a poor ground. Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/48694-signal-light-problems-2012-mack-gu813/#findComment-361313 Share on other sites More sharing options...
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