hi, just bought my ford truck - 1997 f150 xl. Having some issues, when my headlights are on neither one of my signals will work. . when just my runners are on both signals work fine. . any advice or suggestions as to what the problem may be? tried a new gem module but did not fix it. Thanx

 

Do you have the "auto lamp" module with your headlight switch? Flaky electronics in that one.