Cat 777D Mining Truck

[modelman]

JensR-I hooked up-2- servos to channel-3&4. The rocker switch moves the chnl-3-servo full lock one direction. Move the-3-pos. switch up and the-4-chnl-servo moves full lock in one direction. Move the rocker switch down and the servo returns to normal pos... Move the-3- pos. switch back to center and the servo goes back to normal pos.. Move-3-pos. switch down and nothing moves. Tried various combinations and nothing worked differently. I can make the dump box work but for lights I need-1-switch with off-(no power)-on(power). These switches are always on. They just move servos to different pos. and I guess the pots turn the servos off. However, I have never used a radio with switches. Maybe they are all like this. I don't know. I may try the mods to the radio but it involves splicing wires together inside this tiny space and I doubt if I can do that. Oh Well!!!

[JensR]

A switch is basically just a potentiometer with two (or three or in some cases even more)) settings.

So it really depends what positions the switch tells the receiver to move the servos to. I remember reading that these positions are not adjustable with the Traxxas, but it would be worth doublechecking that.

What type of lighting kit are you looking for? I would assume it should work with a channel that goes "full lock".
If all fails, you can actuate a mini switch with the servo to turn on/off the light.

For the dump bed, you can install a buzzer and/or warning light to start once the bed leaves its resting position. Again, use a small switch, this time actuated by the dump bed itself.