CK RX. If you have RTR it should be ok. If you disconnect the plugs. You could have is the location of plugs. There are 2 slots labled #1 for Steering. Steering servo should be on 2nd stot, ESC on #3 slot. You may have to recalibrate your Throttle position(neutral, Full Throt and brakin, follow procedure in manual, Try that!