Power steering probs 1999 MR-S / MR2

power, pump, relay, steering, mr-s, matter, route, steve, advance, gratfully, recieved, bypassing, lights, light, good, sitting, probs, called, 1999, checked, fuses

Hi all we have a mk3 mr2 or mr-s as its called. all was good then while sitting at the lights the p/s light came on and no power steering. i have checked all fuses and there is power getting to the relay but i dont dont think there is power getting to the pump but im not sure. is there anything else i can try before going down the new pump route .. any help on this matter would be very gratfully recieved.. i have also tried bypassing the relay and still nothing happens.. many thanks in