VSS issue in 6.0 swap in 94 4x4

[slow94]

Where do you have the speedo wire tied in? On my 1994 I originally hooked it in before the drac/buffer, and it wouldnt read correct. I bypassed it and went straight into the cluster bypassing the drac/buffer and it worked great ever since. I sold the truck to my friend or I would go get the wire color.

[Mickeymotormount]

Speedo wire should come from the PCM. The VSS wires go to the PCM and the PCM processes that info and sends the signal directly to the speedo on another wire. Should be a dark green/white wire from pin 50 of C-2 connector(Red or Green,depending on year).

[farmtruc]

So the trans is shifting good now that the speedometer wire is disconnected?
Check pin location and do the suggested above. We've done it that way like others have and it works.

Let us know

[slow94]

I found my diagrams, here's how mines wired.
Green wire pin 50 on the green or red pcm connector, then behind your glove box, find the light blue wire coming out of the drac, pin c15(this feeds directly into the cluster). I clipped this wire and spliced it straight into the green wire from pcm pin 50.

[Mickeymotormount]

I found my diagrams, here's how mines wired.
Green wire pin 50 on the green or red pcm connector, then behind your glove box, find the light blue wire coming out of the drac, pin c15(this feeds directly into the cluster). I clipped this wire and spliced it straight into the green wire from pcm pin 50.

+1 to the above.

[HPICamaroSS]

+1 to the above.

What do you guys think? I have my green speedo wire spliced into the blue wire at the vss buffer box. Do i need to cut the blue wire so its not connected to the buffer box? Here is a pic of how it is.

[Mickeymotormount]

I think you're hooked to the wrong wire. My '93 truck schematic has the light blue/black wire going to the speedo.The dark blue wire is the Rear Wheel Antilock Brake wire. If you pull the instrument cluster and look at the plug, there are letter designations for all the terminals on the plug. Letter designation "S" should be the light blue/black wire. This wire is the speedo wire. You can either snip it here and run your green wire directly to the plug or snip it at the buffer box being sure to eliminate the buffer box from the circuit.

[HPICamaroSS]

Speedo wire should come from the PCM. The VSS wires go to the PCM and the PCM processes that info and sends the signal directly to the speedo on another wire. Should be a dark green/white wire from pin 50 of C-2 connector(Red or Green,depending on year).

Thanks! thats a very good tip right there, exactly what I was looking for! So on the transfercase what are the 2 sensors? I am pretty sure the very rear one is the vss whats the one before that. Do I do anything with that first sensor on the tcase?

[slow94]

The first sensor/switch on your transfer case is used to engage the 4wd actuator in your front axle, it also illuminates your floor shifter, and signals the pcm when you have shifted to 4lo, it also has some function for 4wal/rwal.

[HPICamaroSS]

The first sensor/switch on your transfer case is used to engage the 4wd actuator in your front axle, it also illuminates your floor shifter, and signals the pcm when you have shifted to 4lo, it also has some function for 4wal/rwal.

So I just leave that first sensor alone? Dont do anything with it?