jasons69chevelle

Took out my car today for its first drive after the engine and tkx transmission swap.(ran great) My controller was reading 0 mph. The vss pigtail had only 2 black wires. I swapped the wires after getting back. Hopefully that fixes the readings for tomorrow’s drive. If not what are the options to get a speed signal. TKX and T56 use the same vss sensor.

jasons69chevelle

Ok figured it out there are 2 blue wires coming from the MSD atomic efi LS controller dark blue and light blue. Light blue was the signal I had tapped the dark blue (launch control) speed signal is working now.