Automotive Electrical Diagnostics AUT. 149 exam review Questions and Answers 100% Pass

Automotive Electrical Diagnostics AUT. 149 exam review Questions and Answers 100% Pass A potentiometer [type of variable resistor] can be tested with all the following tools EXCEPT: Test light Voltmeter Ohmmeter digital lab scope - Test Light A technician is checking a circuit with excessive resistance. The current flow through the circuit should be 10 amps, but a check with an ammeter measures only 6 amps. The technician measures a voltage drop of 1.0 volts across the switch terminals when the circuit is turned on. What is the resistance of the switch? 2Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 1/16 ohm 1/6 ohm 6 ohms 60 ohms - 1/6 ohm 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? bad fan motor ground high resistance in the fan motor wiring shorted wiring in the fan motor 3Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 all answers are correct - Shorted Wiring in fan motor A technician is testing a circuit that uses a ground-controlled relay to provide power to the circuit load. With the relay installed in its socket, the control terminal of the relay is grounded by a jumper wire; nothing happens. Technician A says check the coil input terminal for voltage. Technician B says connect a jumper wire between battery negative and the output terminal of the relay to check if the load is the problem. Who is correct? A only B only both A and B 4Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 neither A nor B - A only A technician is testing a connector in a circuit with a voltmeter. With the power on in the circuit, the meter reads 12 volts when the leads are placed on each side of the connector. This indicates that the connector _____. is shorted to ground is open is good has current flowing through it - is open All the following are lab scope adjustments EXCEPT: 5Disclaimer: Original Content, No Copyright Infringement, All Rights Reserved © 2025 trigger level slope trigger source amperage level - Amperage level All the following information about the vehicle's wiring can be found in the electrical schematics with the exception of _____.