I think I need a new blower relay for my 1993 olds delta 88 royal the heater fan will cut out at times and then come back on once it's on I do have all speeds working do you think it's the relay?
The blower relay only operates the high speed function. The blower speed resistor operates all the lower speeds. I would suspect the blower speed switch is at fault. Examine the blower speed switch and the plastic electrical plug that plugs into the switch, you may see the plug has melted.