1964 Valiant turn signals

I replaced my tail lights and front parking lights last fall with LED's. Mostly because a "new" 1157 bulb in tail light was melting a rear lens from the heat. Flasher replaced using Slant Six Dan's recommendation. IIRC Federal something. I think the LED's are Phillip's Zeto? New LED's only go in one way because the sockets are keyed with shallow and deep pins.

Here is what is happening:
Of course no 4-way flasher.
Headlights normal
Parking lights normal..
Taillights normal.
Rear turn signals normal.
BOTH front signals now flash simultaneously when either left or right TS are engaged.

There is only ONE TS bulb in dash. It used to flash when making a left or right turn. Not a dedicated bulb for left and right. I thought maybe the filament in the single dash bulb was acting as a conductor between the 2 sides so I temporarily removed it today. No change.

1964 FSM photos attached for reference. One is Valiant with one dash indicator and the other is all the rest of the 1964 Plymouths with L and R indicators.

Anyone have an idea?

I had the same issue, the stock setup reverses the current & ground to the single bulb in the panel. I tried putting diodes in the signal lines but that didn't work.
I had to unplug the TS wires from the round plug in the dash panel and wire 2 small bulbs stuffed into the 'socket' hole, as well as a seperate ground.
Sorry, I don't have any pics of that, and I just put the panel back in the car yesterday after paint!

BobW said:

I had the same issue, the stock setup reverses the current & ground to the single bulb in the panel. I tried putting diodes in the signal lines but that didn't work.
I had to unplug the TS wires from the round plug in the dash panel and wire 2 small bulbs stuffed into the 'socket' hole, as well as a seperate ground.
Sorry, I don't have any pics of that, and I just put the panel back in the car yesterday after paint!

Click to expand...

Maybe so but removing that indicator bulb should have prevented any cross feed. He said "no change". I'm puzzled and subscribed.

BobW said:

I had the same issue, the stock setup reverses the current & ground to the single bulb in the panel. I tried putting diodes in the signal lines but that didn't work.
I had to unplug the TS wires from the round plug in the dash panel and wire 2 small bulbs stuffed into the 'socket' hole, as well as a seperate ground.
Sorry, I don't have any pics of that, and I just put the panel back in the car yesterday after paint!

Click to expand...

Thanks for the reply. Mine is a convertible too.

So it sounds like you pretty much duplicated the other 64 Plymouths wiring as shown in the first photo? Note the ground symbols in the schematic.

I have LEDs for the dash but have not installed them yet as I didn't want to complicate things.
As you know, the panel indicator is a single rectangular slot. Did you use regular incandescent bulbs? Maybe a couple small LEDs placed side-by-side would work. I'd be fine with that. I can see making up a small plastic "plate" with 2 holes to receive a couple LEDs. Held in place with some RTV.

I realize the Valiant was an economy car but a single indicator is pretty un-Chrysler like.

I'll have to get my ducks in a row and maybe try that. But it's top down cruising season and I take the car out 3-4 times a week. Another big overnight show this weekend.

Pull the TS wires from the round connector and try it.