A technician is diagnosing the cause of an insufficient heat problem. He notices the fan is working but not providing much air flow. He disconnects the fan power feed wire and connects the fan to the battery using a fused jumper wire. The specification for the fan motor is 16 amps. His ammeter shows 26 amps when the fan is jumped directly to the battery. What could be the problem?
A) bad fan motor ground
B) high resistance in the fan motor wiring
C) shorted wiring in the fan motor
D) all answers are correct

Question

Quizplus · Accepted Answer

The high current draw (26 amps) compared to the specification (16 amps) suggests that there is a short in the fan motor, causing it to draw more current than it should.

A Technician Is Diagnosing the Cause of an Insufficient Heat