I bought a MOMO auto shift knob and it comes with the over drive button, however, it only comes have two wires and I see there are 3 wires(yellow, red and black) connected to the old shift stick, whick 2 shd I connect to use the OB button ?

Ken

5zigen rearsection/Cherrybomb glasspack resonator/injen short ram intake/AFX UDP/Fidanza cam gears/Power Stop cross drill rotors(front)/shunk2 coilover/Koni adjustable (front)/KYB struts(rear)Konig V-racing front bar/Enkei RSF2 17" with Kumho/ Nakayama
projectors /APC Clear tail light and interior mods

I don't know what to tell you, but where did you buy the shift knob from?? I can't find any

my bad, I bought a Razo.

Ken

5zigen rearsection/Cherrybomb glasspack resonator/injen short ram intake/AFX UDP/Fidanza cam gears/Power Stop cross drill rotors(front)/shunk2 coilover/Koni adjustable (front)/KYB struts(rear)Konig V-racing front bar/Enkei RSF2 17" with Kumho/ Nakayama
projectors /APC Clear tail light and interior mods

i once emailed a guy who got a new shifter for his auto. he said that the 3 rd wire is for the indicator light by your gauges. i hope that helps.

so are u talking about connect the red and black wire in order to use the OD? and leave the yellow wire alone, coz there is no 3rd wires to connect for the shift knob

Ken

5zigen rearsection/Cherrybomb glasspack resonator/injen short ram intake/AFX UDP/Fidanza cam gears/Power Stop cross drill rotors(front)/shunk2 coilover/Koni adjustable (front)/KYB struts(rear)Konig V-racing front bar/Enkei RSF2 17" with Kumho/ Nakayama
projectors /APC Clear tail light and interior mods

I bought a RAZO too, and just installed it. You just have to use the red and black wire. Leave the yellow alone (its just the shift light). Good luck!!