Heater Cores and Blower Fans
Grand Am GT
On a 1990 Chevy astro how do you check the blower motor to see if it is bad?
The most conclusive test of a blower motor is to run a wire from
the battery directly to the motor, being careful not to ground the
wire out anywhere by accident. If the motor will not run when wired
directly to the battery, it is probably bad.