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Old 06-29-2016, 09:34 PM   #1
djeCST
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Turn indicator switch replacement - lots of pictures

As part of my rewiring project I needed to replace the cracked turn signal switch. Searching here for words of wisdom yielded some information, but nothing that shared a start-to-finish description of the job. As it turns out the project isn’t very difficult, but there are a few things you need to know in order to be successful. Note that everything here is for a stock, non-tilt column. I don’t know what differences there may be for a tilt column.

You will need to remove the steering wheel first. My steering wheel was already off of the column, so I’m going to skip that part – there are plenty of good threads here for that.

With the wheel removed, this is what you see:



I have already removed the turn signal and shift levers.

You will need to disconnect the turn signal wiring from the dash harness. First, unplug the semi-circular connector. Next, remove each of the wires from the connector, noting their position (or you can match them up to the other half of the connector still attached to the dash wiring). Take a tiny screwdriver, stiff wire or paper clip and push it in just alongside the terminal on both sides the plug, then gently pull back on the wire. You will need to fiddle around a bit to find the little clip that holds the connector in place. Be patient.



You will probably need to bend the little tabs back out in order to reinstall the wire.



The three screws in the 12, 5 and 8 o’clock positions secure the switch. One by one, back them out almost all the way but not so much that you can remove them. You’ll need to click the switch down to the left turn position to get at the one on the top. Once they are all loose, grab the turn signal housing and turn in counter-clockwise about 1/8 of a turn.



You can now pull the housing with the switch still attached off of the steering shaft. There’s a bearing that sits on top of the assembly, so you may need to tug on it a little.



Now you can remove the three screws that hold the switch in place and remove it. My 1970 C10 has the small emergency flasher stalk, not the larger knob that later model trucks have, so you should be able to simply tip the whole thing out. I think on later models you need to first unscrew the flasher knob, but I don’t have any first-hand experience with that.

Remove the switch and this is what’s left – the upper bearing housing.


From here it’s a pretty simple matter of reversing the procedure. Install your new switch on to the upper bearing housing, lining up the little stud on the back of the switch with the recessed hold on the housing:





Give ‘em a good squeeze together – they should fit pretty tight. You want them to fit together with no gaps.



Thread the wires from the switch through the turn signal housing and tip the switch back in.





Replace the three screws; thread them in just until they are flush with the back of the housing.

Here’s a view from the back side of the housing showing the cutout where the wires go. You can also see how the screws that hold the switch are just flush with the back. Note the three thumbnail-shaped cutouts on the inside edge of the housing – we’ll get to those in a second.



Thread the wires down the column, through the shift lever housing.



The column has three little bumps on the tube that help lock the housing in place, here’s one of them:



Take the switch housing and line it up about 1/8 of a turn counter-clockwise from it’s final location. One of those little thumbnail cutouts will line up with one of the little bumps on the column tube. You may need to wiggle it around a little, but it will eventually drop in to place. Rotate the housing clockwise until it locks into place. Tighten up the three screws and you’re almost done.



Grease the bearing if it needs it and slide it back on to the column shaft. It fits just with finger pressure; the steering wheel nut holds everything together.





Route your wires, plug them back in to the connector and reinstall your steering wheel. Job done!

Hopefully this helps.
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Old 06-29-2016, 10:02 PM   #2
firedemon
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Re: Turn indicator switch replacement - lots of pictures

thanks I need to do this soon mine is cracked and po tried to safety wire it back together it didn't hold and now the right side wont stop flashing unless I turn it back to center . I remember sometimes . other times people wonder where the hell I'm going
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Old 06-29-2016, 10:03 PM   #3
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Re: Turn indicator switch replacement - lots of pictures

This rocks - thank you for the effort. Everything is easier done a second time!
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Old 09-12-2017, 07:23 PM   #4
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Re: Turn indicator switch replacement - lots of pictures

Great info, thanks
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Old 09-12-2017, 07:36 PM   #5
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Thumbs up Re: Turn indicator switch replacement - lots of pictures

Great info.... bookmarked.
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Old 09-12-2017, 08:31 PM   #6
custom10nut
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Re: Turn indicator switch replacement - lots of pictures

Great thread. I have to replace my canceling cam, this shows me what I need to know
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Old 09-12-2017, 10:37 PM   #7
71CHEVYSHORTBED402
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Re: Turn indicator switch replacement - lots of pictures

Awesome, thank you.
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Old 09-12-2017, 11:17 PM   #8
randy500
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Re: Turn indicator switch replacement - lots of pictures

I will add that anytime your in the column you should remove the shifter arm and then the shift bowl, clean and lube it, the grease dries out and they then don't slide well. It slides right off after the shifter arm is removed. On top or it is the indexed plastic washer then the tapered rubber that tensions the upper shift tube.
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Old 09-13-2017, 08:29 AM   #9
72LB
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Re: Turn indicator switch replacement - lots of pictures

Nice job on the tutorial. My only question is why pull the wires out of connector? I never have had to do that although most have had one of these adapters.
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Old 09-13-2017, 10:57 AM   #10
djeCST
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Re: Turn indicator switch replacement - lots of pictures

In order to pull the wires out of the housing you will need to remove the connector - it doesn't fit through the space between the housing and the column. Once you get the hang of releasing the wires it's pretty simple. The key is to take your time and not force anything.
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Old 09-13-2017, 05:04 PM   #11
72LB
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Re: Turn indicator switch replacement - lots of pictures

What I was getting at is some of the TS switches have a strait plug and need the adapter I posted to work. Makes it easier to slip through the housing.
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Old 09-15-2017, 08:53 AM   #12
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Re: Turn indicator switch replacement - lots of pictures

Subbed
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Old 09-15-2017, 03:36 PM   #13
djeCST
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Re: Turn indicator switch replacement - lots of pictures

Quote:
Originally Posted by 72LB View Post
What I was getting at is some of the TS switches have a strait plug and need the adapter I posted to work. Makes it easier to slip through the housing.
I just find it easier to release the wires. I've done it so many times it's second nature now. LOL
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