'67 Belv Turn Signal Malfunction

[TailMover]

Bonjour Amigos: The left signal seems to be doing well with the exception of seeming a tad quick (maybe I've been away from Mopars too long).

The right one has a mind of its own! When selected:

1. No green arrow.
2. Ammeter jitters in short bursts.
3. Both front and rear lights are very dim and flash in step with the ammeter.

Your input is WELCOME. Thanks!

p.s. Just installed new bulbs in all corners.

 

[Yatzee]

Well at least they work, albeit radically. Your problem sounds like a classic example of a bad ground but don't discount other issues like dirty bulb sockets which probably need a good inspection and cleaning. Inspect the bulbs closely for filaments that are loose or hanging inside the bulbs. It's not uncommon to see a bit of twitching on an ammeter or voltmeter when their in operation because the flasher works on load sensitivity and as the bimetal heats in the flasher from the load of the bulbs it will break continuity and remake when it cools. I would change the flasher unit as well and take a close look at the connectors it plugs into. Other areas of concern are bulkhead connectors, poor chassis grounds and the signal switch itself. Use a process of elimination by rigging temporary grounds, checking bulbs and sockets and so on. Got a bit of work cut out for yourself. Take your time and all will be revealed. It can be a bitch to change the signal switch so eliminate all other possibilities first.

 

[TailMover]

Good Afternoon: I'll get to work and keep you advised. Many Thanks & Cheery Bye, John

 

[Glenwood]

also, remember that the old flashers work using a bimetallic strip that heats up from current used through the circuit. A burnt bulb changes the current value and some flashers speed up to indicate a bad bulb.

 

[TailMover]

I replaced the thermal flasher for the emergency flasher today. The flasher still isn't working, but the turn signals are back to normal with the exception of no right arrow light. I'll replace that lamp ASAP. The new flasher is the round type vs. original rectangular shape. I assume it has to be grounded. (Two things I'll never fully understand - Women and Electrics!)

 

[TailMover]

Final Touches:

1. Arrow indicator re-lamped - A-OK

2. The cylindrical thermal flasher snugs well into the original holding bracket.

3. Cleaned "Flasher" switch - A-OK

May all your troubles be this simple!

I replaced the thermal flasher for the emergency flasher today. The flasher still isn't working, but the turn signals are back to normal with the exception of no right arrow light. I'll replace that lamp ASAP. The new flasher is the round type vs. original rectangular shape. I assume it has to be grounded. (Two things I'll never fully understand - Women and Electrics!)