1990 obs speedo connection

[hotrod]

I have searched a bunch and can't find out what color wire (s) need to be hooked up from the inst cluster to make the speedo/odometer/trip to work. This is the last piece of the puzzle so if anyboby out there got their 1990 speedo working I'd love to know how. I have a designated wire coming from my pcm thats labeled speedo and it needs a home!! Thanks.

here's a quote from my thread that chevy-art told me

For the speedometer to work I used the wires what come from the VSS on the transmission, they disconnect from the rear of the trans and go into the cab. The colors are HI 400 Yellow and LOW 401 Purple.

maybe this will help you