on my 2002 Ram 1500 Heater/air switch. I turn the fan on high it works fine. I turn the switch to any other speed it doesn't I replaced the fuse under the hood. I take it out no fan speed. I put the new one in and only the high works. I took the switch completely apart and cleaned the contact, put it back together and still nothing but high works I do not want to be buying switches if that's not the problem thanks in advance