I own a 1993 Nissan Altima with a standard transmission.
I suspect that my A/C blower motor is going on the fritz, but before I tear up the dash with my multimeter in hand, I am posting the symptoms to see if anyone recognizes the problem as something else.
The blower motor works intermittently. Sometimes I start the car, and the blower does not work. The blower will remain nonfunctioning until I hit a bump in the road, and suddenly the blower will spring to life.
The blower motor speed control switch was replaced 3 or 4 years ago. It functions fine when the blower is turning.
During a nonfunctioning spat, I checked the two 20 amp blower fuses, both had power.
My next step is to test the blower motor resistor and the motor itself.
If someone recognizes these symptoms to be something else, please holler, as I really hate the dash tear down routine.
Many thanks - Gary