Test all fuses. Is there an AUX button? Some spas the pump button works both pumps progressively. First press pump 1 low speed, second press pump 1 high speed, 3rd press pump 2 high speed.. or low then high if pump 2 is a 2 speed pump.
If fuses all test good you might have to disconnect pump 2 from the board and test for power coming off the board when pump 2 should be running. If you get power then it is a pump issue if you don't then it is a board issue and possible bad relay.