Question about Traxxas E-Maxx 4WD Monster Truck RTR

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Problems with a emaxx truck running right

I am having problems with a traxxas emaxx truck. Everything is working right except the troddle is not getting power to the motors. Led is flashing green then turns red.

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Here's a few things to check to help you narrow down the problem, if these make no difference, post a reply to this thread with your findings.

First, make sure all your batteries are fully charged, including recharging or putting fresh batteries in your transmitter.

Next, make sure there are no cut, worn, frayed, or broken wires coming from the electronic control unit (ECU) to the motor and the receiver. Also, make sure that the wires are connected with the right polarity, red to positive, black to negative, on the motor.

Then, take apart your receiver box (with the antenna sticking out) and check to make sure all your servo connectors are tight and not corroded or damaged.

Also, with the receiver box open, check to make sure your frequency crystal (silver plug with a colored flag/label) is in tight on both your receiver and your transmitter (it's behind the colored label near the bottom, in the back of the transmitter).

Make sure the frequency crystals are of the same frequency (color and number) on both the transmitter and the receiver. If you haven't changed them out for new ones they should be the same, but you never know. (I.E. if your transmitter has a 27.255 your receiver must have the same exact number, a 27.195 will NOT work with a 27.255 and vice versa)

Next, try purchasing a new frequency crystal set of a different frequency(color) than the one you are currently running. These parts do wear out after a while and even with a new truck they may be defective.

I hope these tips will help you get started and you can always reply with any other questions you may have. If your question is about this problem, remember to post to this thread, I may not be able to find it if you make a new thread for the same problem. Don't forget to rate! Good luck and let me know how it works out!

Posted on Feb 28, 2009

  • wraith0127 Feb 28, 2009

    I'm assuming you mean the LED on the Traxxas Opti-Drive receiver box, right? I forgot to mention about the opti-drive sensor coming from the receiver box to the transmission that causes a blue light to flash when the truck is rolling and is solid or off when it is stopped completely. Check to make sure it is connected tight and there's no build-up of grease or dirt on the inside of the sensor. Check the wires also for cuts or missing insulation. And, check in the transmission to make sure that the gear you can see from the sensor's hole in the side of the transmission is also free from debris, no oil, no grease, no dirt, and make sure all the teeth are in good condition. All these things need to be checked for the receiver to work correctly.

    Also, do you have a seperate battery for your receiver like on the nitro version? If so, don't forget to charge this battery, too! I should look like a gray box with "Traxxas" on the top and a small, rubber sealed, port that if you open that rubber, there will be what looks like a servo connector inside. That is the charge port, but that's only if you have one. (Which I doubt on the E-maxx) Good Luck!

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