Turn Signal Problem - 1964

[David Cotton]

My 64 Sedan DeVille has a turn signal problem. The right front turn signal will not function, but all the rest work perfect. I have changed the bulb and cleaned the socket with no luck. I used a 12 volt tester and the socket is dead. I tested behind the socket and the wires have no juice either. Could it be the turn signal switch? I should mention that I have only had the car a few months and it was not working when I bought it. Thanks for any advice?

[David Cotton]

I agree with you 100%. These old Cadillacs still are showing everyone that they are the Standard Of The World. Amazing machines in EVERY way.

[David Cotton]

Good news!! Today I finally had time to work on the 64. I did a continuity test and all the wires from the firewall to the socket were fine. This told me that the problem was under the dash. I found a black box at the base of the steering column that is connected to the turn signal lever. There are many wires coming out of this. I used electrical contact cleaner and the lights now all work and perform as they should. I was VERY lucky that this fixed my problem, and hope it might help others with a similar problem.

[David Cotton]

I will for sure let you know when I it get figured out. If you get yours fixed first,please share what found also. When I have time, I plan to trace the wiring all the way back until I find power, and fix it from there. See what happens, good luck with yours.

[William Cameron]

I have the exact same problem with the right front turn signal, all the other lights work the cornering light  the top of fender orange indicator light,  checked the bulb the ground etc. but haven't  had much time lately to trouble shoot , I would be interested in the nature of your problem if you get  it to work.

[David Cotton]

Thank you,I will look that up!

[David Cotton]

Hi Jason,

All turn signals and parking lights work except for the right turn signal. Even the right parking light comes on. I did test the blue wire and shows no voltage. Since all other signals work , I agree with your idea that the switch is working. Should I consider new turn signal wire from the fire wall forward? I understand that I must ensure there is power coming from the firewall first of course. Thanks for any input.

[Jason Edge]

Questions:

Is the park light working? Or, is both front right park and turn signal light not working?

Have you supplied 12 volts directly to the turn signal (blue wire) contact and park light (white wire) contact on the light side connector to confirm it would if the connector had 12 volts?

I ask because you can resolve one problem and still have other problems. You need to confirm if you had 12 volts the lights would work.

Next: If your right rear turn signal works when signal lever is engaged I would think it would be something other than the switch. If both front and rear turn signal do not work I would think it would be the switch. Of course it could be a bad connection anywhere in the circuit but eliminate the easy stuff first and know what works and what doesn't.