Thanks for the help. The car is a 1979 and the wiring has proven to be an enormous challenge. I did get the heater blower working. Ultimately it turned out that I had two problems: 1) the ground wire for the relay was connected to the hot wire on the starter, and, 2) one of the high resistance wire coils on the heater resister was burned out. First I went to Radio Shack and bought a ceramic 100 ohm resister resister which worked OK for about 10 minutes then it burned out. Then I got a piece of wire from an old clothes dryer heating element and formed new coil. I think it is going to work fine.