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3/6/12 2:23pm - Original Message: 'Back up light wires'
danascar
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Germansville, PA - USA

Vette(s):
1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

Joined: 1/28/2010
Posts: 763
The previous owner apparently removed back up light switch from transmission (4 sp) and installed switch under dash to turn the lights on. I have installed a new orifginal style switch back onto the tranny and I was wondering where the wires from the the b/u switch ran into the interior to make their connection.I did find a 2 wire plug hanging down from the firewall that was not connected to anything. Could this plug by any chance be the b/u light hookup point?


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Dan T
 

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3/6/12 3:19pm - Reply: 'Re: Back up light wires'
rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
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I think the color of the wires should be pink and lt green that go to the backup light sw on tranny

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Bob R
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3/6/12 3:42pm - Reply: 'Re: Back up light wires'
leggomymako
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East Hampton, CT - USA

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1975 Corvette with T-Tops

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I am having a similar problem in that my reverse lights don't work on my 4 speed either.  I don't know where to look for the switch on the transmission though, where is it hiding?

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3/6/12 5:01pm - Reply: 'Re: Back up light wires'
danascar
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Germansville, PA - USA

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1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

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On my 74 the swirtch is located on the left side of the trans by the shift arms. A small piece of linkage goes from the reverse arm to the switch.

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3/6/12 7:42pm - Reply: 'Re: Back up light wires'
F4Gary Gold Member
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Grapevine, TX - USA

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1972 LT-1 convertible with factory air.

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I have to readjust mine.  Had to take the bulbs out because they kept coming on.

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3/7/12 10:42am - Reply: 'Re: Back up light wires'
rraider1
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Woodland, WA - USA

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Bob R
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3/7/12 10:43am - Reply: 'Re: Back up light wires'
rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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I think someone posted this before this might help

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Bob R
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3/7/12 10:48am - Reply: 'Re: Back up light wires'
rraider1
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Woodland, WA - USA

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1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

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|UPDATED|3/7/2012 7:48:54 AM (AZT)|/UPDATED|


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3/7/12 2:33pm - Reply: 'Re: Back up light wires'
Adams' Apple Lifetime 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

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Dangit Bob!!! I wuz gonna post a link to my pic, but I see you done stole it! LOL LOL LOL

The back-up light switch should have a short harness made onto it, which would run up along side the top of the trans, to a plug hanging from the firewall. Looks like the plug in your post above.

If yer lamps don't werk at all, and you know the switch is there, connected/adjusted properly, start by checking fuses. Then check for power on one of the wires at the switch.


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Joel Adams
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3/7/12 4:48pm - Reply: 'Re: Back up light wires'
leggomymako
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East Hampton, CT - USA

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1975 Corvette with T-Tops

Joined: 10/20/2010
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I couldn't ask for two better illustrations.  Thanks guys.

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4/10/12 6:36pm - Reply: 'Re: Back up light wires'
danascar
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Germansville, PA - USA

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1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

Joined: 1/28/2010
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Well, got the switch installed....that was the easy part. Tried for several hours to get it adjusted to work properly....but....could only get the lights to come on and stay on or go out and stay out....now realizing why previous owner tore the Censored switch off and put a switch under dash. Anybody have any secrets to getting to work properly???
The above adjustment diagrams don't seem to match my switch. Linkage rod looks different.


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Dan T
 

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4/10/12 9:44pm - Reply: 'Re: Back up light wires'
Jaws79 Lifetime Member
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Sykesville, MD - USA

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1979 Corvette Coupe Corvette Light Blue Midnight Blue interior Mirrored Glass T-tops

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The PO had the wrong shift fork so maybe he has the wrong linkage for the back up light? Just a thought. Hope you get it straightened out!
 
Barry
 
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4/10/12 9:55pm - Reply: 'Re: Back up light wires'
danascar
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Germansville, PA - USA

Vette(s):
1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

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Bought a brand new switch for it Barry, original was missing from tranny.

|UPDATED|4/10/2012 6:55:06 PM (AZT)|/UPDATED|


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Dan T
 

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4/11/12 12:45pm - Reply: 'Re: Back up light wires'
Adams' Apple Lifetime 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

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Hard to say what the issue might be without seeing what ya got, but....I believe there are different switch/linkage set-ups for the Muncie, and the Borg Warner. The photo of mine that Bob posted above is a Muncie.
Have you tried flipping the linkage?


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Joel Adams
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4/11/12 2:03pm - Reply: 'Re: Back up light wires'
danascar
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Germansville, PA - USA

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1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

Joined: 1/28/2010
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Joel, have a muncie and have it installed per the above photo with the bend in the rod on the switch and straight part of rod hooked to reverse arm. It appears there isn't much movement of the linkage rod when going in and out of reverse. Is this normal?
When I said rod looks different I was referring to the adjustment diagram not the photo.

|UPDATED|4/11/2012 11:03:35 AM (AZT)|/UPDATED|


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Dan T
 

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4/12/12 12:38pm - Reply: 'Re: Back up light wires'
Adams' Apple Lifetime 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
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Don't s'pose you could take a pic of what you have, and how it's mounted?
You may need to tweek(er...bend) the linkage rod, making it longer/shorter. I don't think the switch can be installed backwards, so that's prolly not the problem....I just wish I could actually see what you have...Disapprove


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Joel Adams
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4/12/12 1:26pm - Reply: 'Re: Back up light wires'
danascar
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Germansville, PA - USA

Vette(s):
1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

Joined: 1/28/2010
Posts: 763
Adams' Apple said: Don't s'pose you could take a pic of what you have, and how it's mounted?
You may need to tweek(er...bend) the linkage rod, making it longer/shorter. I don't think the switch can be installed backwards, so that's prolly not the problem....I just wish I could actually see what you have...Disapprove

Going to be away for a few days but when I get back Sunday I'll get a pic for you Joel. It pretty much looks like the pic in this post. I also did try to make rod longer/shorter by bending with no success. Sort of gave up after that. Cry

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Dan T
 

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4/12/12 3:09pm - Reply: 'Re: Back up light wires'
manchestershark Lifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.

Joined: 10/31/2007
Posts: 1895
No one elas has mentioned this, but mine has two elongated holes where the switch bolts on the bracket. SOME adjustment can be made on the bracket itself.

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4/13/12 1:00pm - Reply: 'Re: Back up light wires'
Adams' Apple Lifetime 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: 19448
danascar said: Joel, have a muncie.....


Uhmmmm....a '74 should have the Borg Warner Super T-10 in it....
The set-ups are similar for both, anyway. Mine is on the ground right now, or I would crawl under it and take a snap of how mine is. I might have a pic somewhere on one of the computers at home, but....I ain't holding my breath.

fyi for everyone...The BW T-10 has 9 bolts holding the side/shift cover to the case. The Muncies have 7, as seen in the above photo. Thumbs Up


Is this the switch you have, Dan?





|UPDATED|4/13/2012 10:00:00 AM (AZT)|/UPDATED|


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Joel Adams
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4/15/12 2:56pm - Reply: 'Re: Back up light wires'
danascar
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Germansville, PA - USA

Vette(s):
1974 Coupe 358ci 4 speed Black w/Medium Saddle interior w/79 custom leather seats

Joined: 1/28/2010
Posts: 763
Jacked it up today and relized it is darn near impossible to take a decent pic with the exhaust pipe and how close it is to the body. The switch looks like the one in your pic, Joel, and the whole setup looks like the pic above of the whole side of tranny. It does have 7 bolts on the shift arm cover and the shop guy that rebuilt it told me it was a rock crusher. This is about the best I could do on a pic:


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Dan T
 

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