When you wire up the speedo sensor to the auto tranny harness, there are two black/yellow wires. I clipped the wrong one on the first try, went back and spliced into the other one with no ill effects. I would have to go look at the car to tell you the exact wiring I did. The reverse sensor switch requires the pigtail off the manual transmission as well. I pulled one off a neon as it is the same plug.