Topic: Unknown wiring - 82 CE
in Forum: C3 Electrical
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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
Mystery solved! I'm still confused on the black connector with two lights....
Joel Adams
C3VR Lifetime Member #56 
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Cramerton, NC - USA
Joined: 8/22/2006
Posts: 1094
Vette(s): black 1982 coupe slate gray interior, 350 crossfire, 1985 fuel pump, Steeroids R&P conversion
I found another pic that leaves no doubt it attaching to the back of the speedo cluster but doesnt actually show the attachment. I guess that one is figured out but so far no help with the black one.
I was narrowing it down I think it is a vehical speed sensor I think those 2 lights may get the pulses from the speedo for the ECM computer Found this
rraider1 2011-02-20 22:03:31
Electronic speedometers use a vehicle speed sensor to generate magnetic impulses to a buffer that cleans up the VSS signal for smooth operation. The clean VSS signal is sent to the processor that calculates speed and then displays it on the dash.
81-82 Corvettes have a hybrid VSS system using a hall-effect sensor mounted to the back of the speedometer head for VSS computer input with the mechanical driven speedometer.
Lifetime MemberModerator
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
The buffer takes a DC signal and converts it to a steady AC signal that the ECM can read.
Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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Oak Creek, WI - USA
Joined: 5/21/2008
Posts: 1965
Vette(s): 1981 Great White Shark. Red Interior, 350/190 hp. PS, PB (SS), A/C CC, T-Tops. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vettes Car Club. 175,000 Original miles!! Now own a 1998 C-5!
You are inceed correct. That is the speed sensor. The CCC Vehicles had this to covey the signal back to the computer.
Dan
in Forum: C3 Electrical
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