lately the problem is att times the edrive has the light blinking for the s when it working right the light on the edrive for the s stays on it wont auto steer when light is blinking. the s2 dosent lose signal or power. i can follow the lights to stay wherre i need to be. some days it dose it for about 15 minutes then work right then there are days when it will work fine. i dont know what the problem is. i have changed the wires and the s2 with a diffrent s2. i have changed the edrive with a diffrent edrive. am i missing something?