Gremlins in turn signals
In my '67 GTV, I have turn signal problems.
Turning the stalk for right side, the right front and rear lights flash, but rapidly, probably twice the normal speed. I don't have a problem with the fast flashing, but it seems to me that that condition indicates some kind of problem, right?
Turning the stalk for left side, the left side lights do not flash. But the front turn signal bulb is on steady, but at about half brightness. The rear turn signal bulb is not illuminated at all.
When the column switch is activated for a left turn, applying a test light to the stalk contact for left side glows steady, but at about half intensity, and it flashes full bright every few seconds, very slowly. Applying the test light to the left rear turn signal bulb gives the same result - test light glows dimly with full flash every few seconds. But the rear turn signal bulb is not on at all like the front one is.
I can hear the flasher unit operating for right side, but not for left side. (If the flasher unit does not click for left side, why does my test light flash on left contacts and bulbs, although slowly?) BTW, the flasher is a Carello unit with three spade terminals, although the wiring calls for only two wires, black to column switch and red to fuse. It has been in there for years and years, when all turn signals worked. The third spade terminal has always been unused. I have a wiring diagram and can find no problem with wiring or connections, etc.
I hope the behavior I described rings a bell to someone with more expertise than I have in electrical matters.