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Originally Posted by Stephen Kowski
make sure the backup battery is charged/ plugged in because it will mess up communications between oi & rc....
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Actually, the RC will communicate with the OI without the backup battery. Just make sure the main battery is charged (with 11+ volts in it - you can check it by hitting the select button on the OI a few times). However, the 7.2v backup battery is reponsible for running the pwm signals to the victors.
As for the solenoid problem, it sounds like you have a short in your wiring somewhere, or maybe something wired to the spike/relay block wrong. Check all your connections, use an ohm meter to make sure theres NO continuity on your bot, and check the PWM/relay cables. It seems that we got a few bad ones this year. After you finish checking everything, find another electronics specalist on your team to check it over again.