When performing a voltage drop test on a 12v blower motor circuitthe reading is 2.7 volts across the fan switch when closed. What is the maximum voltage available at the fan?

To find the maximum voltage available at the fan, subtract the voltage drop across the fan switch from the supply voltage. In this case, with a 12V supply and a 2.7V drop across the switch, the voltage available at the fan would be 12V - 2.7V = 9.3V. Therefore, the maximum voltage available at the fan is 9.3 volts.