Years ago installed a dash tach in the place of the clock in my ‘72 Charger. Ever since then when the right turn signal is turned on the tach bounces from zero to the idle rpm. The left signal does not do it. Seems it would be a ground issue. I have the cluster out working on other mods so wanting to address the issue now. Any ideas what to do or look for?


‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring
‘14 Big Horn, Quad Cab, 4x4, 1500