C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Electrical question

Thread Tools
 
Search this Thread
 
Old Oct 1, 2008 | 11:13 AM
  #1  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default Electrical question

Is there a cut-out type of switch on the clutch that won't let the starter motor engage unless the clutch is depressed on my 1970? Recently, I have gone out to the garage a few times and turned the key and nothing happened. The couple of times it has happened so far, I have pumped the clutch a few times, and then the starter behaves normally. So, if there is such a switch, could this be sticky and/or not adjusted properly and be causing this situation?

Thanks,

PK
Reply
Old Oct 1, 2008 | 11:14 AM
  #2  
xCCTer's Avatar
xCCTer
CF JASOC Member
Supporting Lifetime
15 Year Member
 
Joined: Feb 2006
Posts: 8,040
Likes: 34
From: Downtown Annapolis, MD. The Future is where we all have to live. Let's not screw it up.
St. Jude Donor '08-'09-'10-'11
Default

Originally Posted by PKguitar
Is there a cut-out type of switch on the clutch that won't let the starter motor engage unless the clutch is depressed on my 1970?

Yes.
Reply
Old Oct 1, 2008 | 11:48 AM
  #3  
...Roger...'s Avatar
...Roger...
Race Director
 
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Default

Originally Posted by xccter
Yes.

But I have also seen the pumping action physically move the engine which could move a wire which could make a connection.One other possibility is the engine could be grounding through the clutch Z bar and your pumping action makes the ground.Just some thoughts.You could temporarily put a jumper on your clutch safety switch and drive it a couple days and see if that cures the problem,if so its not the grounding issues I described.(Remember if you do the jumper your car will start in gear with the clutch engaged.)
Reply
Old Oct 1, 2008 | 12:00 PM
  #4  
Duke94's Avatar
Duke94
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Default

Looks like this. It's the one with the link. Should have a couple of large purple wires on it. May need adjustment or replacement.


Last edited by Duke94; Oct 1, 2008 at 12:06 PM.
Reply
Old Oct 1, 2008 | 01:07 PM
  #5  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

Awesome guys! I think I want to try the jumper first to see what happens. I understand that this will defeat the safety feature while installed. If I am seeing the picture correctly, the clutch pedal arm is to the right of the picture with the link attached to it, and appears to be in the fully depressed position. That link crosses over what looks to be the brake light switch, and attaches to the clutch cut out switch on the left side of the picture. Looks like I would just hook the two ends of the jumper to each of the two connectors that will be attached to the two tangs I see in the picture. For clarity, this assumes that the switch is supposed to be closed (connected) when the clutch is depressed and open when it is not. Sounds simple enough from my office chair. Let me know if I have this wrong.

Thanks,

PK
Reply
Old Oct 1, 2008 | 01:12 PM
  #6  
Duke94's Avatar
Duke94
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Default

Originally Posted by PKguitar
If I am seeing the picture correctly, the clutch pedal arm is to the right of the picture with the link attached to it, and appears to be in the fully depressed position. That link crosses over what looks to be the brake light switch, and attaches to the clutch cut out switch on the left side of the picture. Looks like I would just hook the two ends of the jumper to each of the two connectors that will be attached to the two tangs I see in the picture. For clarity, this assumes that the switch is supposed to be closed (connected) when the clutch is depressed and open when it is not. Sounds simple enough from my office chair. Let me know if I have this wrong.

Thanks,

PK

You are correct, the pedals are depressed. Switch is normally open and closes when the pedal is pushed. As you said, jumper the 2 purple wire together and give it a go.
Reply
Old Oct 1, 2008 | 02:44 PM
  #7  
corvetteload's Avatar
corvetteload
Melting Slicks
 
Joined: Aug 2005
Posts: 2,359
Likes: 15
From: Confusion
Default

Called a neutral safety switch
Reply
Old Oct 1, 2008 | 02:46 PM
  #8  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

Sounds good. One other thought, you say "large purple wires". Do these things have any substantial amperage going through them? The reason I ask is that the jumpers I have at home are real thin wire, like maybe 20 gauge. I walked down the street to the local Radio Shack, and they had heavier gauge wire jumpers, but the wire was 30 inches long. If this has a lot of amperage, I am thinking at very least I should use 2 of the little jumpers, or maybe make up a heavier gauge jumper for the job. Any thoughts?

PK
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
Old Oct 1, 2008 | 03:02 PM
  #9  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

Originally Posted by corvetteload
Called a neutral safety switch
I see that on my wiring diagram. Then, just below that, is a circle which is labled "Clutch Pedal Switch (synchro)". What is that?
Reply
Old Oct 1, 2008 | 03:28 PM
  #10  
...Roger...'s Avatar
...Roger...
Race Director
 
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Default

GM calls the standard trans switch a couple things and there are probably more. transmission safety starting switch,clutch operated neutral start switch

The auto trans switch is usual referred to as the neutral safety switch but GM also refers to it as transmission safety starting switch,neutral switch,neutral safety backing lamp seat belt wiring switch and the neutral & backing lamp switch.
Reply
Old Oct 1, 2008 | 05:44 PM
  #11  
Duke94's Avatar
Duke94
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Default

Originally Posted by PKguitar
Sounds good. One other thought, you say "large purple wires". Do these things have any substantial amperage going through them? The reason I ask is that the jumpers I have at home are real thin wire, like maybe 20 gauge. I walked down the street to the local Radio Shack, and they had heavier gauge wire jumpers, but the wire was 30 inches long. If this has a lot of amperage, I am thinking at very least I should use 2 of the little jumpers, or maybe make up a heavier gauge jumper for the job. Any thoughts?

PK
Make a heavy jumper as it carries some current. The wires are 12 gage.
Reply
Old Oct 2, 2008 | 08:26 AM
  #12  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

Will do. Thanks for all the help. I tried to get my big *** under there last night with the car in the garage with no luck at all. I will have to wait until I can put the car in the driveway so that I can open the door all the way. Tomorrow night is the earliest that could happen. I'll let you know how it works out!
Reply
Old Oct 2, 2008 | 05:39 PM
  #13  
Duke94's Avatar
Duke94
Le Mans Master
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Default

Take the seat out. Four bolts and you're done. It makes it MUCH easier to work under the dash.
Reply
Old Oct 6, 2008 | 09:17 AM
  #14  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

OK, Friday night, I made the special jumper, 12 gage wire, 12 inches long. Sunday, I tried to take the seat out, the first bolt I tried was horribly stripped, the first sign that Bubba has taken a turn with a wrench on my car. I also noticed that one of the bolts is missing, so I got a new addition to my "winter projects" list for the car and abandoned the effort for right now. Anyway, with the door wide open, I did manage to get my oversized, beer-and-cheeseburger-bloated body in the car upside-down and pulled the connector off the switch. I jumped it and so far, the starter problems are gone. I'll give it another few days for more cold starts etc., but my confidence that the switch is the problem is on the rise.
Reply
Old Oct 6, 2008 | 09:54 AM
  #15  
joshtried's Avatar
joshtried
Burning Brakes
15 Year Member
 
Joined: Mar 2008
Posts: 1,038
Likes: 39
From: Denver, CO
St. Jude Donor '08-'09-'10
Default

i have a stupid question for this post...
does the car require you to push in the clutch to start? ive never heard of manuals not needing them pushed in...?
Reply
Old Oct 6, 2008 | 10:04 AM
  #16  
GD70's Avatar
GD70
Le Mans Master
15 Year Member
 
Joined: Jan 2007
Posts: 5,485
Likes: 7
From: Peekskill NY
Default

Originally Posted by joshtried
i have a stupid question for this post...
does the car require you to push in the clutch to start? ive never heard of manuals not needing them pushed in...?
Yes.
Reply
Old Oct 6, 2008 | 11:03 AM
  #17  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

Originally Posted by joshtried
i have a stupid question for this post...
does the car require you to push in the clutch to start? ive never heard of manuals not needing them pushed in...?
Actually, until I bought this car, I never owned a manual where you did have to depress the clutch to start! Most of the older manual cars I have owned were VWs, they don't have a cutout on the clutch. The prior C3 I owned was heavily Bubbatized such that I didn't have to worry about being in reverse to get my key back, and thus, no real need for the clutch cutout. Of course, when I bought that car, you could start the car without the key for the pinnacle of convenience, some people don't appreciate that kind of modification though. It's still kind of surprising to me now when I open the door and a light comes on, amazing!
Reply

Get notified of new replies

To Electrical question

Old Oct 8, 2008 | 08:59 AM
  #18  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

The problem of turning the key and having nothing happen evaporated beginning Saturday when I jumped the switch, so I am convinced the switch is the problem and want to replace it. I looked at Eckler's online yesterday and couldn't find it. I am sure I will find one, but if anyone knows who has it and can easily point me there, I would appreciate it.

Thanks for all the help!

PK
Reply
Old Oct 8, 2008 | 09:17 AM
  #19  
...Roger...'s Avatar
...Roger...
Race Director
 
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Default

I thought I saw it on the Wilcox site the other day but must have been wrong,Volunteer says they have it.
http://www.volvette.com/EL63K.html
Reply
Old Oct 8, 2008 | 09:25 AM
  #20  
Derrick Reynolds's Avatar
Derrick Reynolds
Thread Starter
Team Owner
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2008
Posts: 23,419
Likes: 22
From: In limbo
St. Jude Donor '13-'15, '17 thru '22
Default

Thanks, that is it. Yesterday I only checked Ecklers, I didn't get around to Willcox or Mid-America because I left a little early to take my car out for a ride! $60, ouch! I'll check the other two to see if they have it cheaper, but I doubt it. Oh well, I need the part. I don't feel like driving around with the safety features disabled.
Reply



All times are GMT -4. The time now is 10:37 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE