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Wiring an electronic speedo

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Wiring an electronic speedo

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Old

Mar 30, 2020 | 09:30 AM

#1

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Wiring an electronic speedo

I am putting a classic instruments guage into my 57 Chev truck. Installed a 01 4.8 w a 4L60E and a FITech ultimate LS w/trans controller.
I am no wiring genius and am stumped on one issue.
The electronic speedo has to be connected to the VSS The gauge instruction says:
( b. One (either) wire of an electronic transmission 2-wire vehicle speed sensor [VSS]. i. Connect the other wire of the VSS to the same point as the wire harness Black ground wire.)
Do I disconnect the wire from the FITech wiring harness or do I just tap into these wires. (two wire )

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Mar 30, 2020 | 09:54 AM

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I've just tapped into the VSS for the speedo signal and it doesn't seem to effect the other circuits.

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Mar 30, 2020 | 10:19 AM

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Does it matter which wire you tapped into.

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Mar 30, 2020 | 01:20 PM

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Can't remember wire color but it's the one that sends the pulses to the ECU. If one is black, that should be ground.

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