speedo wont work on my ls1 swap?/
10-08-2005, 12:38 AM
#1
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Car: 91 rs with ls1
Engine: ls1
Transmission: t56
speedo wont work on my ls1 swap?/
i have a vss out put and its suppost to hook up to the tan wire but when i hook it up i still have no speedo? its a 91 so it electronic pick up. any help?
10-08-2005, 03:41 AM
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Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
When I hooked up the speedo in my 91Z28, the wire was gray in the C207 connector under the dash.
make sure you bypassed the VSS buffer box if your car was a TBI car.
Hope that helps
-jason
make sure you bypassed the VSS buffer box if your car was a TBI car.
Hope that helps
-jason
10-08-2005, 11:46 PM
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
I just used the output from the LS1 PCM and hooked it up to the input going to my stock gage... works fine after we tuned my tire size and rearend ratio in the PCM! 
10-09-2005, 01:56 PM
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Car: 91 rs with ls1
Engine: ls1
Transmission: t56
where is that wire located?
does theat wire run from the speedo through the fire wall or is the gray , or tan wire in the car? i thought it ran through the fire wall block?
10-09-2005, 10:40 PM
#5
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Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
The C207 connector is near the factory ECM behind the kick panel on the passenger side. That is where I connected to the speedo.
I don't beleive the speedo goes through the bulkhead connector at the firewall
-jason
I don't beleive the speedo goes through the bulkhead connector at the firewall
-jason
10-10-2005, 07:12 AM
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Car: '91 GTA
Engine: 402ci LS2
Transmission: faceplated T56
Axle/Gears: 9" w/ 4.11's
Yeah, the speedo wire is over by the passenger kick panel near the old TPI ECM. It does not go thru the driver's side firewall bulkhead connector. We just connected to it over there.
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10-13-2005, 04:12 PM
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Car: 91 rs with ls1
Engine: ls1
Transmission: t56
where is this tan wire located
i no its on the passanger side of the car in by the old ecm but is it in a connector with about 6 othere wires? i can seem to find it
10-17-2005, 03:48 PM
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Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
Mine has about 12 or 15 wires in it.
It is black, and right in front of the ac box, but behind the dash.
For example, mine was just above the lip in the center of the foot well.... if that makes sense.
I'm sure if you search, you'll probably find a picture of one
-jason
It is black, and right in front of the ac box, but behind the dash.
For example, mine was just above the lip in the center of the foot well.... if that makes sense.
I'm sure if you search, you'll probably find a picture of one
-jason
08-15-2014, 01:59 PM
#11
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Car: 1991 Camaro Z28
Engine: 2002 SS LS1
Transmission: 6 speed
Axle/Gears: Auburn 3.42
Re: speedo wont work on my ls1 swap?/
oldddd thread, similar problem. So you guys ran the wire to the bulkhead connector infront of the steering column? I did that and it doesnt work. What about running it straight to the wire that runs to the printed circuit for the gauge cluster?
08-17-2014, 04:21 PM
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Car: 92 Firebird
Engine: Supercharged 6.0
Transmission: T56
Axle/Gears: 8.8 3.73
Re: speedo wont work on my ls1 swap?/
Do a search, I've posted a lot of specific info about the speedo and LSx/lt1 conversions
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