ELE 146 CERTIFICATION SCRIPT 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
● After isolating, the 20-amp fuse, that power is the rear grid, you check the voltage to
the fuse, verified that the fuse is not open, inspected the fuse terminals. What is the
next step to isolate that concern?. Answer: Check the control relay found on the electrical
schematic for power
● After testing the relay for power , we found that there wasn't any loss of power and
the relay is operating, allowing the power to pass to the grid. What should you do
next?. Answer: Check that the circuit has power from the output of the relay to the rear.
● A customer brings a vehicle in and complains that the rear window diffuser is not
diffusing properly. What is the first step in diagnosing this customer concern ?.
Answer: Verify the concern
● There is no related service information or TSBs open for this symptom. The concern
is still present. What is the next step?. Answer: Isolate what fuse in circuit powers, the rear
diffuser using an electrical schematic
● Next to check defrost, good ground circuit for in open or high resistance. Using the
DMM, you measure resistance between the ground terminal of the defrost grid and the
chassis ground. The DMM does display reads 'OL'. What is the next step ?. Answer:
Repair the open in the ground circuit
● You have checked the 12-volt power terminal attached to the grid and you have not
lost voltage to the fixed terminal on the rear window. The ground to the grid is
complete. Now that you've verified the problem from switch through the relay into the
ground, when is the next step?.. Answer: Check the grid for any opens in the element
● Now that we have verified that the glass will not clear the frost away by taking the
vehicle for a road test, what is the next step in this diagnostic process?. Answer: Check
for any related service information or TSBs
● Using an electrical manual to locate the ambient air temperature sensor, you can find
no mud or contamination on the sensor and the electrical connection is tight and the
terminals fit tight. What is the next?. Answer: Test the sensor for proper power and ground
using a DMM
SOLUTIONS GRADED A+
● After isolating, the 20-amp fuse, that power is the rear grid, you check the voltage to
the fuse, verified that the fuse is not open, inspected the fuse terminals. What is the
next step to isolate that concern?. Answer: Check the control relay found on the electrical
schematic for power
● After testing the relay for power , we found that there wasn't any loss of power and
the relay is operating, allowing the power to pass to the grid. What should you do
next?. Answer: Check that the circuit has power from the output of the relay to the rear.
● A customer brings a vehicle in and complains that the rear window diffuser is not
diffusing properly. What is the first step in diagnosing this customer concern ?.
Answer: Verify the concern
● There is no related service information or TSBs open for this symptom. The concern
is still present. What is the next step?. Answer: Isolate what fuse in circuit powers, the rear
diffuser using an electrical schematic
● Next to check defrost, good ground circuit for in open or high resistance. Using the
DMM, you measure resistance between the ground terminal of the defrost grid and the
chassis ground. The DMM does display reads 'OL'. What is the next step ?. Answer:
Repair the open in the ground circuit
● You have checked the 12-volt power terminal attached to the grid and you have not
lost voltage to the fixed terminal on the rear window. The ground to the grid is
complete. Now that you've verified the problem from switch through the relay into the
ground, when is the next step?.. Answer: Check the grid for any opens in the element
● Now that we have verified that the glass will not clear the frost away by taking the
vehicle for a road test, what is the next step in this diagnostic process?. Answer: Check
for any related service information or TSBs
● Using an electrical manual to locate the ambient air temperature sensor, you can find
no mud or contamination on the sensor and the electrical connection is tight and the
terminals fit tight. What is the next?. Answer: Test the sensor for proper power and ground
using a DMM
