Lets start with some terminology:
RADIO=a square or pistol type handheld controller with a long aluminum antenna and two levers (left for throttle right for steering) or one lever (trigger) and a knob (steering wheel). These levers and knobs control steering and speed.
RECEIVER=a rectangular device that is installed in your car or truck that receives signals from the radio and passes them to your Servos. Has a long wire antenna attached which is typically fed through a thin plastic tube that protrudes from the vehicle during use. Also connected to the receiver are your 3-wire leads to your servos.
SERVO=rectangular device that is used to control steering or throttle. The only moving part visible from the outside is a round protrusion that turns when power is on and you move your controls on your radio. Attached to the top of the protrusion is a servo horn.
SERVO HORN=typically a small white or black plastic peice in the shape of a "T" or "I". It has small holes in the arms through which your steering, throttle, and shifter linkages are connected.
LINKAGE=thin metal rods that connect from your servo horns to the steering tie rods, shifting levers, and throttle body on the carburator of your engine. These transmit the movement of the servo and servo horns to the respective devices.
Bob, based on the above terminology can you please give us a better description of the problem so that we may help you.
