03-21-2016, 02:54 PM
just thinking if you used the yellow wire from the ground of the robo tank and joined that to the ground of the driver. Do this take the yellow wire off the ground for the pwm and use a wire that has female and male like you used for the relays. put the female end on the ground pin just under where you have the pwm plugged in just like the yellow wire is now then you can take the pointed end from the other end and touch it to the ground and see if the sound goes away or not it should not hurt any thing its just an extra ground Touch it to the out negative
not the out on the inside ok
not the out on the inside ok
