no speedo after carb swap
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Supreme Member
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Joined: Dec 2006
Posts: 1,116
Likes: 1
From: Guilford, Connecticut
Car: 1987 Trans Am
Engine: 355
Transmission: t56
Axle/Gears: 3.73
no speedo after carb swap
I took the ecm completly out (was a 305 tpi) and I can't get my speedo to work, I read something about a buffer box on here, what exactly is that?
I have a TCC switch that uses the VSS, so I assume it will run the speedo if I connect it to the original wires so I need to know what color the original wires running to the speedo in the dash are (my haynes manual says brown and black/white but none of those seemed to work)
thanks, Tim
I have a TCC switch that uses the VSS, so I assume it will run the speedo if I connect it to the original wires so I need to know what color the original wires running to the speedo in the dash are (my haynes manual says brown and black/white but none of those seemed to work)
thanks, Tim
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Joined: Jan 2006
Posts: 3,341
Likes: 12
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
Buff It Out
The buffer looks like this.
It should be located near the ECM.
On some thirdgens it’s behind the dash.
Different years/models used different wire colors.
You can probe the buffer with an audio amplifier.
The line with the higher pitch goes to the speedo.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
I Didn’t Jump The Start, The Flagman Was Late
.
It should be located near the ECM.
On some thirdgens it’s behind the dash.
Different years/models used different wire colors.
You can probe the buffer with an audio amplifier.
The line with the higher pitch goes to the speedo.
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
Happy Racing!
◙◙◙◙◙◙◙◙◙◙◙◙◙◙◙
I Didn’t Jump The Start, The Flagman Was Late
.
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