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1990 iroc z VSS wire location in dash help?

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Old Dec 15, 2025 | 07:16 PM
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1990 iroc z VSS wire location in dash help?

Can someone point me in the right direction to the VSS wire location in dash please? I need to install a Dakota digital box and I rather intercept the wires before the ecu. Really not trying to take apart random dash pieces exploring.
Thank you for any help.
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Old Dec 15, 2025 | 07:31 PM
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Car: 1967 Camaro, 91 z28
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Re: 1990 iroc z VSS wire location in dash help?

Why not hook into c207 ?
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Old Dec 15, 2025 | 07:35 PM
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Re: 1990 iroc z VSS wire location in dash help?


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Old Dec 15, 2025 | 08:01 PM
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Re: 1990 iroc z VSS wire location in dash help?

Originally Posted by Tuned Performance
Why not hook into c207 ?
I'm not sure what you mean by c207 but my pinout show c1-b10 for the 7730. I may just do it at the ecm, just want to see my options.
thanks.
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Old Dec 15, 2025 | 08:21 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1990 iroc z VSS wire location in dash help?

Originally Posted by Jlands
I'm not sure what you mean by c207 but my pinout show c1-b10 for the 7730. I may just do it at the ecm, just want to see my options.
thanks.
okay, it’s literally next to the ecm
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Old Dec 16, 2025 | 10:08 AM
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Re: 1990 iroc z VSS wire location in dash help?

Originally Posted by Tuned Performance
okay, it’s literally next to the ecm
I guess with the 35 year old wiring harness, i wanted to disturb it as least as possible..... especially, if for say, the vss wire passed behind the radio or something.
I do appreciate the time you took to respond though.
Thanks.
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Old Dec 23, 2025 | 07:13 AM
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Re: 1990 iroc z VSS wire location in dash help?

Originally Posted by Tuned Performance
Hey, I've been going over this chart and I don't understand. I don't see the vss wire in this list.
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Old Dec 23, 2025 | 08:14 AM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1990 iroc z VSS wire location in dash help?

D cavity grey wire
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Old Dec 23, 2025 | 09:02 AM
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Re: 1990 iroc z VSS wire location in dash help?

Originally Posted by Tuned Performance
D cavity grey wire
is this after ecm? Was wanting before exm. Need tc lockup managed as well.
Thanks
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Old Dec 23, 2025 | 10:41 AM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1990 iroc z VSS wire location in dash help?

It’s output to ip, before is at the ecm yellow and purple
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Old Dec 23, 2025 | 02:49 PM
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Re: 1990 iroc z VSS wire location in dash help?

Originally Posted by Tuned Performance
D cavity grey wire
Really appreciate the help. Decided to tap the a6 wire for power and hook directly to ecm. I see you suggested on another post. Up and running and works like a charm.
Thanks again.

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Old Dec 29, 2025 | 11:02 AM
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Re: 1990 iroc z VSS wire location in dash help?

Also, I had jumping at idle with the setup. The cure....
RUN B11 DIRECTLY FROM THE SGI-100BT instead of from the 7730.
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