'62 Turn Signal Issues

[GWs62]

My front turn signals will both flash at the same time when the turn signal lever is in either left or right position. The running(parking) lights work fine and the rear turn signals flash independently as they should. I installed an American Auto wire harness and it has performed flawlessly and I'm pretty sure this isn't the problem. I have added additional grounding for each turn signal just to be sure.
I have also traced the wiring back to the turn signal switch on the steering column and everything is in place.
Any thought/ideas/recommendations?
What am I missed here?

[bpmcgee]

Have you proved to your own satisfaction that your housings are actually grounded all the way to the battery? With the wires and the bulb removed you should have continuity from the ground terminal in the socket to the battery.

B

[forestb]

Are you using LED bulbs? If you are and are still using a mechanical blinker at the fuse box and not an electric one that is probably you problem. I had LED tail lights and an electric blinker and it worked fine then I tried to install LEDs in my front turn signals and they would both blink at the same time. Sense then I have just kept the fronts as regular bulbs.

[GWs62]

I have confirmed continuity from the housing to the battery (sans light sockets) and I'm using the amber 1157 bulbs.

[Palf70Step]

!st check the grounds, more than likely that is it. If you cannot see some short in the wires, then it is probably in the turn signal switch itself.. More than likely I'd say you have a grounding issue

[62 Barnfind]

Originally Posted by GWs62

My front turn signals will both flash at the same time when the turn signal lever is in either left or right position. The running(parking) lights work fine and the rear turn signals flash independently as they should. I installed an American Auto wire harness and it has performed flawlessly and I'm pretty sure this isn't the problem. I have added additional grounding for each turn signal just to be sure.
I have also traced the wiring back to the turn signal switch on the steering column and everything is in place.
Any thought/ideas/recommendations?
What am I missed here?

It's your switch. I had the same problem with mine.

[GWs62]

Thanks for your input guys.
62 BF, I am using the original switch...
It appears the replacement isn't very expensive so I'll give it a try.
I'll keep you posted.
Thanks!

[damnyankee36]

Besides the switch being bad, if the two output wires from the T/S switch to the front turn signals, (DK BLU and LT BLU?) are shorted together, power will flow to both lights when either right of left turn is selected.

Doubtful, but...

[andyh1956]

What happens when you step on the brake pedal?

[GWs62]

I haven't tried the brake pedal. Will try that and see if it makes a difference.

I ordered a new switch, guessing if the switch is bad that it is shorting the lt blue/drk blue wires together inside.

[63C20]

you have the brake and dignal wires mi9xed up. definitely

[GWs62]

Stepped on the brake with the turn signal on and nothing changed.
I'm expecting the new switch to arrive later this week. Let's hope that makes a difference.
Thanks again for all your input.
g

[damnyankee36]

Any luck?

[GWs62]

Still waiting for the new switch...
Hopefully in the next day or so.
Thanks for asking.
g

[GWs62]

Finally received/installed new switch last night and I have the same problem. Being late and frustrated prevented me from delving into the drk/lt blue wires. I will be checking those blue wires when I get home tonight. I think they both go into the same slotted connection/terminal(?)

[andyh1956]

I have found that when T/S electrical it is best to unhook everything & start from the beginning. That is to say unhook the front & rear lights. Then just hook the brake switch input up to the switch. Then step on the pedal & make sure current flows down the two wires to the rear lights. When that is completed move to the next circuit, say the LR and so on. Trying to get all circuits working at once can cause you to "Loose Your Rabbit".

[damnyankee36]

Originally Posted by andyh1956

I have found that when T/S electrical it is best to unhook everything & start from the beginning.

Good advice.

Just thought of something. The dash T/S indicators are tied into the front T/S lights. Do the dash indicators flash together too?

If they do I would do as andyh1956 suggested and pull the 3-terminal fire wall connector on the diver's side. That will at least tell you what side the problem is on.

Keep the 6-terminal connector that's next to the 3-terminal in place as it carries the main power feed to the truck.

[JPBrecheisen]

For the hell of it, try new bulbs. I had an issue with my 65 some time ago and came to find out, it was one of the bulbs causing it. Changed the passenger bulb and it was fixed. I was using the regular 1157s also. It may have been the bulb case itself wasn't grounding to the turn signal housing.

I also tend to agree with the rest of the crowd here on making absolutely sure the grounds are all good.

[GWs62]

Thanks for the input guys!
Here's something else to think about: The American Auto Wire kit I installed has L/R turn dash indicator wires spliced with the L/R turn signal wires. (both lt blue and dark blue) My '62 has only one turn signal indicator on the dash.
Is there a chance this could be the "short"?

I have brand new bulbs in the sockets and have swapped them to make sure.
I'll check that 3-wire plug also.

[forestb]

When I installed my painless kit I had the same problem. I had two wires going to my dash indicators with my stock wiring. When I installed the kit there were two wires but it did not work when I plugged them in. So I had to add a second blinker. I do not have the original gauge cluster so it was easy to add a new indicator.

[damnyankee36]

Interesting... According to the AAW instructions, there was a left and right T/S indicator for 60-61 and 64-66 but only one indicator for the 62-63.

They show to connect both the LT BLU and DK BLU to each terminal in the one socket, (the socket is ungrounded BTW). Using my 69 Camaro diagrams, that has the internal wiring diagram of the turn signal switch, doing this will not cause a short between the two. It actually is a dead end for both left and right functions. There is no ground return for either wire that I can see.

I'm trying to find a 62-63 diagram to see how it was originally wired. It's possible the T/S switch only had one T/S output. This wiring job has been done thousands of times before. There has to be way around this.

GWs62, do you remember how you connected the blue wires?

[damnyankee36]

Found a diagram. Yes, both wires go to a single, ungrounded socket. In the factory diagram, the LT BLU wire is labeled LBL and the DK BLU is labeled DBL W/S. Don't know what the W/S means.

So, if both blue wires are going to an ungrounded socket, it should work, although I sure don't know how. I can't find a return path to ground.

[62 Barnfind]

Did you get it figured out?

[damnyankee36]

This has me intrigued. I contacted AAW, here's what they said:

Is he running LED bulbs up front? With a shared turn indicator you cannot. If he is not running LED bulbs make sure the light assemblies are grounded correctly and that the hood has good ground to body. The turn signals on this truck are very touchy because of them being on a shared indicator.

[GWs62]

I am not using LED bulbs and I have run individual ground wires from each housing to see if it makes any difference. (it didn't)

Unfortunately this part of my project is on hiatus as she's in for some final painting/buffing. I hope to have her back in a few days.

I would like to send pics when I get a chance, if that helps. Since each indicator wire is paired with its corresponding turn signal wire in the socket, I was wondering if it might make any difference if I eliminated one of them.

Thanks again for your input guys.
g