Hi, I have a 1969 oldsmobile 98 with power windows. I replaced the master window switch but windows move slow then stop working. After I wait they will work again slowly as before. Is it possible I have a bad power window relay? . If my car has a relay I can't find it. I looked under dash in front left kick panel area. I do have 2 relays in the engine bay on firewall. Could one of these be the power window relay