Speedo not working
Thread Starter
Joined: Jul 2000
Posts: 1,519
Likes: 18
From: Fort Myers, FL
Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
Speedo not working
After the swap..... I've tried connecting the output to the red/black and pink/black wire on the C207 connector to no avail. All the other guages work now.
Any suggestions? I'm going on a 2 hr road trip and the speedo working would be nice since its all interstate and I havent' got the cruise hooked up yet! LOL
Edit: 91Z28 w/ 95 LT1/T56
-jason
Any suggestions? I'm going on a 2 hr road trip and the speedo working would be nice since its all interstate and I havent' got the cruise hooked up yet! LOL
Edit: 91Z28 w/ 95 LT1/T56
-jason
Last edited by Jaysz28; Aug 11, 2005 at 08:55 AM.
Supreme Member

Joined: Jun 2001
Posts: 9,550
Likes: 5
From: Charleston, SC
Car: 91 Camaro Vert
Engine: 02 LS1, HX40
Transmission: 2002 LS1 M6
well first, go into your profile and say what kind of car you have.
then tell us if you have a LS1, LT1 or whatever... and what trans if its not the stock one for that motor..
assuming you have a electric speedo in your car, just take the 4000ppm output wire (cant tell you what one since i donno what engine/harness you have) and connect it to the gauge, BYPASSING any buffer boxes.
then tell us if you have a LS1, LT1 or whatever... and what trans if its not the stock one for that motor..
assuming you have a electric speedo in your car, just take the 4000ppm output wire (cant tell you what one since i donno what engine/harness you have) and connect it to the gauge, BYPASSING any buffer boxes.
Thread Starter
Joined: Jul 2000
Posts: 1,519
Likes: 18
From: Fort Myers, FL
Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
Yeah, that info would be helpful......
I connected the speedo output wire to the C207 connector. I can see the speed on the scan tool, just not getting it at the speedo
Thanks
-jason
I connected the speedo output wire to the C207 connector. I can see the speed on the scan tool, just not getting it at the speedo
Thanks
-jason
Supreme Member
Joined: May 2004
Posts: 2,924
Likes: 1
From: Kingston, Tn
Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Hey Jason find the yellow buffer box on the car, you will splice the output wire into the wire in pin C on the buffer wireset which is a tan wire. Here is the picture of what you should have. It doesn't go into the 207 connector.
Supreme Member
Joined: May 2002
Posts: 1,218
Likes: 1
From: Chicago, Il
Car: 1987 Trans Am
Engine: Lt1
Transmission: T56
The box should be located on the lower passenger side of the dash. You'll have to remove a trim panel and then remove the box. It is no longer needed.
Thread Starter
Joined: Jul 2000
Posts: 1,519
Likes: 18
From: Fort Myers, FL
Car: 91 Firebird
Engine: 6.0
Transmission: T56
Axle/Gears: 3.73
Thanks to Z28ric<x>er, the speedo is working.
I have a VIN F car, so no buffer box that I could find. I had hooked the speedo up to the input wire for the cruise. The Speedo is a gray wire. Now it works fine.
I will need a buffer box if I want to retain the crusie, as it uses a 2000ppm signal vs the speedo's 4000ppm signal
Thanks for the help though
-jason
I have a VIN F car, so no buffer box that I could find. I had hooked the speedo up to the input wire for the cruise. The Speedo is a gray wire. Now it works fine.
I will need a buffer box if I want to retain the crusie, as it uses a 2000ppm signal vs the speedo's 4000ppm signal
Thanks for the help though
-jason
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