When I turn on the turn signals they light but don't flash. If I add another bulb inline and touch it to ground the turn signals flash and the spare bulb does too. Do I need to run a ground from the flasher? Or maybe a chasis ground on the instrument panel?

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire