The SDL is a 1987 model, it has an electronic speedo. I searched on here and later found the VSS is on the back left side of the trans and still hooked up.
I'm thinking on getting a cheap used speedo from the local boneyard to see if it's in the speedo OR the wiring. Everything looks hooked up properly and securely under there.
Unless there is some fuse/relay I'm missing under the hood I'm out of options.
