Yes. He connected a battery, a motor, and a receiver. Pulling the throttle on the transmitter made the motor spin. So I assume this would be enough to justify if the ESC works, wouldn't it?

Did the seller demonstrate reverse as well?
If not, can you connect a continuity tester across yellow and red (everything else disconnected, no battery, receiver, etc) and let us know what you see?

http://www.frontlinehobbies.com.au/S...ctID=LRP-84500

I don't think the ESC has reverse at all. I will test it tonight when I go back home. Niznai I appreciate your help big time. Thank you.

You are right there if your speedo is the one in the picture. It is confusing because usually only speedos with reverse come with four wires colour coded as yours. Speedos without reverse come with only three wires (red, blue, black). Well, everything should be fine then but if your soldering skills are good you should redo that mess at the red/yellow wires. Leave the capacitor there (solder it to the red), it can't hurt.

For now I think I will leave everything intact. My soldering skill is one of the worst I think. It last time took me 30 minutes to solder a dean plug. Very embarrassing. Haha.. Thanks again for your help!