Dryer Cord 4 Prong To 3 Prong Adapter June 3, 2019 Changing Dryer Cords From 4. If you have found that your dryer plug does not match the outlet, follow this step-by-step guide to changing a dryer cord from 4-pronged to 3-pronged. www.thespruce.com How To Splice Trailer Light WiresHow To Wire A 30 Amp 4 Prong PlugHow To Take Power From A Light SwitchHow To Wire A Switch Into A CircuitElectric Dryer InstallationHow To Add 220 OutletToggle Switch 3 Way4 Wire Ceiling Fan Light Switch