Diodes are used extensively in the electrical circuits of every Skyjack aerial work platform and telehandler. We use them primarily to separate common circuits from each other. For example, the SJIII electric powered scissor lifts use diodes to allow multiple circuits to power the pump motor solenoid but each separate function valve will remain unpowered; only the specific function valve that is asked for will be powered. The diode acts like an electrical check valve allowing power to flow through it in one direction only.
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