my heater and ac will only work on high speed, and i think maybe it is a relay switch problem. is there a way to get a picture of what all the fuses go to in the fuse box
need diagram of fuse box on 1998 Ford Contour
fuse box relay diagram
5 more answers , 1 more comment
This is very often the result of the failure of the blower fan resistor, it controls the low fan speeds, but not the highest speed.
i got the same problem
This is the most likely culprit, have had the same problem.
i got kinda same problem my ac keeps going on off on off enven when don,t got it on ac and my fans keep runnig all time not sure if that is normal seems were pretty much same problem
fixed it took out my faulty ac i bought my fans run fine now hehe