Appreciate the link, 1poolman1.You need to get a Jandy 2-speed relay to operate a 2-speed pump safely. An example is here: Jandy 6796 2 Speed Relay Kit | PoolSupply4Less. Otherwise both high and low speeds could be operated at the same time. Best thing that could happen is a breaker trips, usually the motor is severely damaged.
Also, DIP switch #2 must be placed in the "on" position. The instructions that come with the relay are fairly easy to follow.