We have a 4WD1 rower but unfortunatelly whenever we try to work it , only two of four wheels are working perfectly , we changed our battery and we have just gotten a new more powerful battery which is 7.2 V 1300 MA ; our problem is , wheever we changed the cable connections and jumber arrangments all four wheels are working butthey are working slowly . is tihs a jumber problem or power problem
I would be grateful if you ask me as soon as possible thanks
Eray
We will need more information. Which motor controller are you using? What is sending it control pulses? How is it wired? Are you using the BEC if the motor controller has it?
i use scorpion, atomic bot board and basic atom 28 pin. i wired them as in the figure 2 in lynxmotion.com/images/html/build065.htm thnx for help
No comment
Are the motors on each side wired in series or in parallel 
Also note the word is spelled is spelled jumper, not jumber. 
You probably need to use a multimeter to check running voltages to the motors and for poor or incorrect wiring connections.
i controlled the voltages for the motor and connections. the motors r wired in parallel. at last it works without the ps2 brand controller. but i want to work with ps2 controller. when i programmed with the code in lynxmotion.com/images/html/build034.htm, the output on the terminal1 is not ‘79 255 255 124 122 …’. my output is FF 255 255 255 255 … . what must i do?
i said that it works without ps2 controller but i have some problems again. it moves forward and when i push A turns right. whne i push C turns left. but this times it moves for a few second than the stat led on scorpion starts to blink fastly. thnx for your helps.