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Topic: Steering column diagram needed for 72

in Forum: C3 Electrical


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Steering column diagram needed for 72 (1/12)
 5/15/15 6:29pm
Mac3
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Posts: 28

I took the column apart to replace the turn signal switch and now my key will not turn to off. Obliviously! I got something installed wrong. I need a good diagram if anyone has one I would really appreciate it.

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Re: Steering column diagram needed for 72 (2/12)
 5/15/15 10:23pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20126

 Check out Jim Shea's Steering Papers for just about any info you will need on Corvette steering columns and gearboxes. Thumbs Up


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Joel Adams
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Re: Steering column diagram needed for 72 (3/12)
 5/23/15 10:28am
persico
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Long Valley, NJ - USA

Vette(s):
1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack 2019 Grand Sport Coupe, M7, Ceramic Matrix Gray with gray interior


Joined: 3/21/2007
Posts: 292

What he said! I've found Jim Shea's site very helpful!

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Mario

Re: Steering column diagram needed for 72 (4/12)
 5/23/15 7:11pm
Mac3
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Guys and gals, I have looked at Shea's stuff but I can't tell how some parts go back together. When I took the lock plate off there where two metal spring like parts in the bottom of the housing. From what I can tell, they may be part of the key warning buzzer. Does anyone have any pics they took when you performed a bearing replacement? I have know idea how these parts go.

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Re: Steering column diagram needed for 72 (5/12)
 5/23/15 8:14pm
Vman73
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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.


Joined: 10/2/2014
Posts: 405

Hey Mac, just went through my column a month or so ago. Sorry I don't have any pics, but could you post some pics of the parts your talking about ?? They might jump start my memory and maybe I can help you out.

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John Sigmund
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Re: Steering column diagram needed for 72 (6/12)
 5/24/15 8:53am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20126

A pic of your "spare parts" will definitely help determine the issue. The key warning buzzer switch fits down into the casting by the ignition cylinder. It can cause a problem turning the key all the way off sometimes,if not properly installed. Other things can cause it, too, so we need to know what parts you are not sure about, then we can help with re-assembly.



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Joel Adams
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             NCRS

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Re: Steering column diagram needed for 72 (7/12)
 5/25/15 1:48pm
Vman73
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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.


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I think that's one of the two spring like parts Mac is referring to. Once you remove the key buzzer switch shown in the picture, there is another black spring clip thats supposed to be underneath it.

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John Sigmund
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Re: Steering column diagram needed for 72 (8/12)
 5/25/15 10:30pm
Mac3
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Pic 1

Pic 2

(modified huge images to links-aapple Big smile)


|UPDATED|5/25/2015 7:30:04 PM (AZT)|/UPDATED|


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Re: Steering column diagram needed for 72 (9/12)
 5/25/15 7:14pm
Mac3
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Sorry about the size. Not sure how to make smaller. Anyway, I got it all back together it turned out to be the bezel just behind the lock housing. Apparently it must be turned all the way left when you put things back. This is so the ratcheting mechanism rides in channel. The switch works good but will not return to the lock position and the key will not come out. I guess I have the gear behind the lock cylinder in the wrong place. The other bad news is that I still have my no brake light issue when lights are on and no turn signal when brake depressed and lights off. Turn signals work when lights off and brake not pressed. Brake lights work when lights off. The other weird thing is that when I turn my left signal on and car is off, but the lights are on the accessory power comes on. I have a screwed up wiring problem and I sure don't no where to begin. Thanks for all your help Guys.

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Re: Steering column diagram needed for 72 (10/12)
 5/25/15 8:27pm
Vman73
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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.


Joined: 10/2/2014
Posts: 405

Mac, don't worry about picture size, I'm sure Joel will perform some of his admin. magic and resize. So regarding the problem, just confirming this is a '72 with what appears to be a standard (not tilt/tele) column ?? You state you have it all back together wtith key and elec. problems, are the two spring things in your hand are still out ?? I have a friend with a spare '73 standard column, I may go steal it and take it apart to help you out. I haven't worked on a standard column in a long time and your first photo looks totally unfamiliar to me right now. Did all of your elec. problems start when you replaced the TS switch ??

|UPDATED|5/25/2015 5:27:18 PM (AZT)|/UPDATED|


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John Sigmund
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Re: Steering column diagram needed for 72 (11/12)
 5/25/15 8:46pm
Mac3
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No sir, problems existed prior to my destruction. The hope was that my electrical problems where the result of a faulty turn signal switch. This was based on a post I read. Those Spring things I believe are the parts for the buzzer. There was no buzzer switch so I am beginning to think that this thing has been apart before. Thanks for the offer but don't go to that trouble. My plan is to keep focusing on the electrical issues and come back to the column. I need to install a new key switch and gear anyway so I will have it apart again and that is when I will address the buzzer do hicky. Got any idea on my electrical whoas?

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Re: Steering column diagram needed for 72 (12/12)
 5/26/15 3:33pm
Vman73
Former Member

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Gig Harbor, WA - USA

Vette(s):
1973 L82 4 Speed Coupe - Very original, well documented driver/survivor. 2016 Bend Regional NCRS Top Flight.


Joined: 10/2/2014
Posts: 405

No problem Mac, let us know when you want to return to the steering column. Regarding the electrical problems, it certainly sounds like you have issues with the twin filament lights in the system - running/brakes, running/signal and signal/brakes. I assume that you also have similar issues if you try to use the hazard lights because they use the same filament as the signals/brakes. I also assume that you did not have any problems with your TS switch installation since you mention the same problems existed prior to that.

Not sure what you have already done, I would start with 4 fresh double filament bulbs, should be 1157's at all four corners for the signals/brakes. While changing out the bulbs give careful inspection to the condition of the sockets. Make sure they're clean, no rust or corrosion and the bulbs fit properly. I also like to use dielectric grease when I replace bulbs to prevent future corrosion. Once you're bulbs and sockets are good to go, I would then check out the ground wires. Most of the electrical issues I've dealt with on these cars have been supposed repairs gone wrong or bad grounds. All of your problems deal with the double filament bulbs and only when you try to light the second filament. Since those bulbs and sockets share a common ground, I would go there first. As your are doing your inspection, keep and eye out for splices, non-factory connectors and black taped wires.

According to the assembly manual, each pair of tail lights has a ground wire coming out of the main harness that connects to the backside of the lamp housing then jumpers to the other housing. I would check those four connections first. Make sure they are clean of grime and rust and have the proper washers installed. On the front end, it looks like there is a single ground connection located by the horn. Two other ground connections to be aware of that may be part of your problem are the braided ground strap from the birdcage to the frame near the left front body mount and the steering column rag joint. The braided strap grounds most of the dash connections back to the frame and the rag joint grounds the steering column to the fame via the steering box.

As you check/clean each ground, try your lights to see if there is any change. You can also make up a jumper wire with a pair of alligator clips that is long enough to jump back to the main battery ground. I do this to bypass any suspect ground wire or connection to make sure I have a good ground before moving on.

Download a copy of the '72 wiring harness if you haven't already done so, there is a link from the Adam's Apple post in the main electrical section. Keep your eyes open for any wire labeled black that is connected to the lighting system and look for grounds I may have missed. Good luck and let us know what you find !! 


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John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member



Duct tape is the new Black !!
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