speedometer

I have done alot of searching and just want to make sure i understand this correctly.i have a 1992 chevy pickup 2wd 5speed manual with a 2004 5.3 with a 1999 pcm cable throttle body.I want to hook up the vss from the tranny to the pcm and then out from pcm to speedometer.The vss input on the pcm red connector is pin 20 vss low signal pin 21 vss high signal and pin 50 vss output.Does it matter what which vss wire from tranny goes to which pin 20 or 21?Which wire is the output from the drac box to the speedometer so i can connect the output from the pcm behind the glovebox?

Thanks Joe

Anyone with any help?

Will the DRAC box work with a 4000ppm signal? I was told it had to be a 2000ppm signal. I am fixing to order one of the dakota digital signal conditioners to get my speedo working. but then again my DRAC is built into the cluster on my 91. I am runnign a nelson harness and am not sure. I can look on it and see what pin Nelson is useing for the speedo if you would like.

Yeah that would be cool.My drac is behind the glovebox.I won't be using the drac signal.I will have the trans vss go to the 5.3 computer and out from the 5.3 computer to my speedo.

Ok. I looked on my nelson harness and the speedo comes out of the red connector pin 50. Hope that helps. Let me know how it works out.

I will let you know.I probably won't get it done until next weekend i have to install a boiler this weekend.

I just used the speedo wire from the pcm and hooked it directly to the speedo. I don't know how, but it works fine for my '94 with original gauges.

Good deal.Thanks for the input.

Let me know how it works for you. I am gonna try to hook that up tonight. I found a setting in HPtunners that I can turn the signal down to 2000ppm. Will report back if it works. Just gotta figure out the wire schematic for my 91 cluster.

I am going to do it this weekend.I will let you know how i make out.