I installed a SM-160 universal turn signal unit in my 52-3100 /12volt truck last week and every thing works turn signals brake lights 4 ways , but the lights on the unit don't there are two green ,to indicate lift and right turn and one red to indicate 4 way any ideas as to why? I even ran a seperate ground wire to the unit and that did not help.

Thanks Pete

1952 Chevy 3100
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