COMPUSHIFT II Manual Installation Current: Install the Overdrive Cancel Switch (Optional) Install the Overdrive Cancel Switch (Optional) HGM offers a billet push-button switch that can be used for overdrive cancel on transmissions that need it.Installing the SwitchHere are the simple instructions on how to install it:Locate a position that is easy to reach from the drivers seat.Drill a 19mm or 3/4" hole for the switch.Install the switch from the front with the o-ring in place.Install the nut on the rear of the switch. Tighten gently.From the switch, the red and yellow wires connect to ground. These wires have a ground lug already installed.The green wire on the switch connects to the blue/yellow wire from the COMPUSHIFT II engine harness labelled "O/D CANCEL"The other black wire from the switch connects to the blue/red wire from the COMPUSHIFT II engine harness labelled "O/D CANCEL LED" Using the SwitchAfter the vehicle is started, the overdrive function is enabled.Press the switch once to disable overdrive. The LED ring will turn on.Press the switch again to enable overdrive. The LED ring will turn off. ×