Many early Bronco owners have switched from vacuum to electric wipers. One draw back to the switch is the 2 speed electric motors are not synchronized. Our new synchronizing wiper motor switch is the answer. Not only does the new switch sync up the motors but it also has three intermittent speeds as well as normal high and low. It has an integrated push button washer switch and up and down arrows for wiper speed selection. Instructions are included. All you add is the wiring.