John,

My RC hobby level car has one powerful motor and one servo. The motor drives both the front and the back tires. The servo positions the steering. The RC has three channels. One is not used.

I do not know how to draw a circuit diagram on a computer. What application do you use?

You mentioned a six pin ICSP header. I have no idea what that is. Wikipedia says, "Most PICs that Microchip currently sell feature ICSP (In Circuit ... special headers ". I can not picture that. I am acronym deprived.

I got an email from Microchip today telling me that my order has been shipped. I will wait for it to arrive then go to Radio Shack to see what they sell that looks like what I got. The man there seemed very helpful.

I plan to switch between the two PWM signal aimed at the ESC. Not the power to the motor.

I am concerned about the power because the radio receiver on my car gets its power from the 7.2volt battery via the ESC. I do not want to power the PIC from that source. A common ground is no problem.

You wrote:
"If you have a standard setup with 3 wire servo cables, you need to switch the signal wire only (this has the PWM signal on it). The power (red typically) and ground (black typically) can be common to all the components. You will need a common ground for all this stuff."

I do not want the power to be common to all components. I want the PIC to have its own supply. Yes, it is the white signal line into the ESC that i wish to switch, but that implies common power.

What application do you use to draw a circuit diagram?

Ken