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Topic: Mystery Wires in Engine Bay

in Forum: C3 Electrical

Mystery Wires in Engine Bay

Posted: 7/9/16 8:57pm Message 1 of 8
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Long Beach, CA - USA
Joined: 2/26/2016
Posts: 11
Vette(s): 1981, Grey, six-speed tremec
I have an 81 Vette, in which a Tremec 6 speed was transplanted.  While underneath, I found 2 wires that were cut and sitting under it.  THey are dark blue and green, and appear to be original.  Then went up to the top of the firewall, to a connector.  I have looked through wiring diagrams and manuals and it does not look like they went to the old transmission (or anything else I can find).  Any ideas would be appreciated.


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Re: Mystery Wires in Engine Bay

Posted: 7/9/16 10:48pm Message 2 of 8
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray
We the original transmission auto or manual?


1973 L-82 4 spd

Re: Mystery Wires in Engine Bay

Posted: 7/10/16 6:32am Message 3 of 8
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
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
Prolly speed sensor wires to the cruise control. The TCC connector would have tan, grey, and black wires.


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Re: Mystery Wires in Engine Bay

Posted: 7/10/16 10:47am Message 4 of 8
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Long Beach, CA - USA
Joined: 2/26/2016
Posts: 11
Vette(s): 1981, Grey, six-speed tremec
The original was a 4-speed manual, no cruise control.


Re: Mystery Wires in Engine Bay

Posted: 7/10/16 11:42am Message 5 of 8
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 914
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray
Since it's a manual, I suspect it might be the backup lite switch. Don't know of any other electrical connections to 4-speed.


1973 L-82 4 spd

Re: Mystery Wires in Engine Bay

Posted: 7/10/16 6:31pm Message 6 of 8
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CHESHIRE, CT - USA
Joined: 5/2/2016
Posts: 64
Vette(s): 1969 350 4 spd drop top 1972 350 auto coupe
73shark said: Since it's a manual, I suspect it might be the backup lite switch. Don't know of any other electrical connections to 4-speed.



I agree that is what it sounds like, without a wiring diagram in front of me. I recall the older cars had green and pink? wires


Re: Mystery Wires in Engine Bay

Posted: 7/10/16 10:03pm Message 7 of 8
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Long Beach, CA - USA
Joined: 2/26/2016
Posts: 11
Vette(s): 1981, Grey, six-speed tremec
Well, I think that is it.  I just put the car in reverse and checked, and no reverse lights.  Thanks guys!


Re: Mystery Wires in Engine Bay

Posted: 7/22/16 1:45pm Message 8 of 8
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Long Beach, CA - USA
Joined: 2/26/2016
Posts: 11
Vette(s): 1981, Grey, six-speed tremec
Thanks again, guys.  I was able to buy a pigtail, hook up the wires, and now I have reverse lights.
 
 



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