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1960 Oldsmobile Forum • View topic - Turn Signal Switch Assembly

Turn Signal Switch Assembly

Interior and Electrical

Moderator: toolbox

Turn Signal Switch Assembly

Postby Skidmark on Mon Dec 08, 2008 4:26 am

Hey what's up,

I'm chasing down an issue with my turn signals. Here's the issue when I started: When I would trigger the left signal the signal switch snaps into place and the left front signal flashes - as well as both the left and right rear signals - all three flashing very fast. When I try to do the right signals, the mechanics for the switch wouldn't engage to let it snap into place - so I've never actually triggered the right signals at all...

Parking lights all work properly.

So, let the trouble shooting begin -

1) Pulled off the steering wheel and monkeyed with the mechanical parts of the switch. The lubricant was pretty dried up, so it was just stuck and not able to get into the right signal position. After playing with it for a little while I was able to free it up and get the right signal to snap into place properly, but no flashing lights.

2) Replaced all bulbs (I bought a full car bulb set with the intention of replacing all the bulbs anyways, so this was quick & easy & cheap).

3) Replaced the flasher with a new 550

4) Still the same results all around

So now it seems like the mechanicals ans lever on the switch are engaging properly, but I'm still getting kooky results.

One other thing I found interesting, there was a small ball bearing under the switch assembly spring (The spring that is on the opposite side of the column from the stalk and holds the stalk in place until the turn is complete). There was only one ball bearing, but it looked like there was supposed to be one in each cutout under that part of the assembly.

Should I keep on digging? Maybe replace the actual electronic switch itself? Maybe just spray contact cleaner in there?

Another question, what type of lubricant should I use for the signal switch assembly?

Thanks!

Alex
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Re: Turn Signal Switch Assembly

Postby Skidmark on Tue Dec 09, 2008 2:46 am

Tonight I buttoned things back up, fixed and sprayed the cam for the switch, so it now clicks into both the left and right signal positions. I just left it with the single ball bearing (don't have many of those knockin' around the garage).

I cleaned out the socket of the bulb that wasn't working and reinstalled it. Still works for the parking light, but not the signal. I noticed one of the posts in the misbehaving socket is loose, so maybe I have a bum socket...

The symptoms have changed a little though. Now when I hit the left turn signal all three lights flash at a normal pace (all but front right signal). When I hit the right turn signal nothing happens.

What do you think? Replace the socket or the switch or both? Any ideas? Seems like switches are hard to find so I think I'm going to try to do a new bulb socket first.
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Re: Turn Signal Switch Assembly

Postby super88dan on Tue Dec 09, 2008 3:46 am

My system is screwy also. If I use the right blinker (directional) I will on occassion, lose my brake lights. It all goes to the same place. If the grounds aren't quite perfect, it doesn't work. If the switch doesn't make it back to a "home" position, it doesn't work. I'm glad that they taught us the hand signals back in driver's ed.
I haven't truely faced the problem yet. I am considering having my car rewired. A Spring bake sale might help.
Take it easy.
super88dan

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Re: Turn Signal Switch Assembly

Postby Skidmark on Tue Dec 09, 2008 4:09 am

Can you tell its laundry night?

So I have a switch that I bought off ebay, thought it was the wrong model... did some research and found I really did have the right switch sooooo, what the heck I swapped it out.

The plot thickens...

Now the front right turn signal works properly, but the rear right signal only flashes with the left signals! Again, all running lights work properly.

So at least now I know the sockets and bulbs are all fine, seems to reason the switch was bad (found some gunk on a contact), and I guess there's some bobo wiring going on? I now have to figure out which wire is running to which bulb I guess?
Skidmark
 
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Re: Turn Signal Switch Assembly

Postby Skidmark on Tue Dec 09, 2008 5:22 am

Ok, been thinking about this as I fold shirts.

Issue Defined: Right rear turn signal comes on with left signals. Right front signal works properly. Signals flash at proper tempo in either direction, running lights work.

Possible Causes:

Theory 1: Bobo wiring, but how am I getting 3 left signals when there should only be 2 left leads leaving the switch? How do I trace them? Guess I should trace at fuse box.

Theory 2: My replacement switch is a bum switch also? Well... I had the same problem with the other switch, and this switch resolved the issue with the front right indicator.

Any other ideas for a solution?
Skidmark
 
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Re: Turn Signal Switch Assembly

Postby greg pettit on Wed Dec 10, 2008 5:13 pm

I strongly suspect that there is a ground issue. The left side lights may be grounding through the right rear teillight bulb.

Anyway, here's an electrical schematic, I hope it helps.

Good luck,

Greg

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1960 4 door Dynamic 88 sedan
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Re: Turn Signal Switch Assembly

Postby Skidmark on Thu Dec 11, 2008 12:28 am

greg pettit wrote:I strongly suspect that there is a ground issue. The left side lights may be grounding through the right rear teillight bulb.


Greg - thank you! I'm not familiar with how this happens or what to check to diagnose this potential cause. Should I just check the wiring on the right rear bulb socket? I really appreciate the input, as you may have noticed this has me stumped. :oops:
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Re: Turn Signal Switch Assembly

Postby greg pettit on Thu Dec 11, 2008 1:27 am

I just noticed that the wiring diagram shows up pretty small in my post. If you have any trouble enlarging it I would be happy to email the original file to you.

As for diagnosis, I would start with the right rear taillight bulb, and remove it. Actuate the left turn signal and see if anything changes. What we are looking for here is if the system is attempting to find its ground through the right rear bulb. If nothing changes, then reinstall the right taillight and remove the left one and try again. Somehting should be different. If there are no differences, remove both taillight bulbs and see what happens.

One of three scenarios are likely here.

1. broken ground wire somewhere in the turn signal circuit

2. chafed or shorted together power wires to the taillight bulbs

3. someone has purposefully wired both taillights together to correct some other problem

I recently saw all three of these on the same car, with the same symptoms. Granted, this was a Mercedes Benz, but wiring cares not what kind of car it's in.

Greg
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Re: Turn Signal Switch Assembly

Postby Skidmark on Sun Dec 28, 2008 2:36 pm

Greg - thanks again for your help! Unfortunately I'm *still* chasing the problem. Ha! I pulled each bulb and experimented but I get the same behaviour no matter what... I inspected the wiring to the tail-lights and its lookin' pretty suspect. I think I'm going to rewire everything from the wiring connector that sits above the rear axle back to the lights. Its pretty sketchy looking and was all painted over when the trunk was flecked. That will be a fun afternoon project :) Anyone know of a resource for a kit that might help me with that?
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