I put on new fan and washed out the air conditioning coil, but it didn't appear to help. I also straight wired the fan directly from the battery to see if it was an electrical problem in the speed control. The volume didn't change. Check vacuum hoses for leaks or loose connections in the engine compartment. Lately the heater fan has been making odd sounds at regular and low fan speed.
High speed is ok.
Tonight, I turned the car off to run in to the coffee shop. When I started the car up, I had no headlights, signal lights, and the climate control. The car ran ok. Parking lights and instrument panel are fine. I checked the fuses and alls well.