The Stovebolt Site Forums The Shop Area The Electrical Bay Universal turn signal switch

Bad grounds can cause lights to act mysteriously.

Note that the switch itself must be grounded through the clamp that's holding it on. I didn't want the clamp scratching my newly painted column, so I wrapped rubber around the column. The switch didn't work, so I ran a separate ground wire from the clamp down to the firewall.

If the switch is grounded OK, you can check that all 4 light bulb sockets are grounded.