AUT 242- CHAPTER 7 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
1. List the numbers used on schematics to indicate grounds, splices, and connectors and where they
are used in the vehicle. - Answers Grounds, splices and connectors numbers listed on a schematic are
305 for ground located in the passenger compartment,
102 for connectors located under the hood
202 located under the dash
2. List and identify the terminals of a typical ISO type relay. - Answers 86-Power side of the coil
85-Ground side of the coil
30-Switch power for the relay
87-Normally open output (N.O)
87a-Normally closed output (N.C)
3. List three methods that can be used to help locate a short circuit. - Answers Test Light Method,
Ohmmeter Method and Gauss Gauge Method
4. How can a tone generator be used to locate a short circuit? - Answers A tone will be generated as
long as there is a continuous electrical path along the circuit. The signal will stop if there is a short-to-
ground or an open in the circuit
1. On a wiring diagram, S110 with a ".8 BRN/BLK" means - Answers a Splice of a brown with black
stripe, wire size being 0.8mm2 (18 gauge AWG)
2. Where is connector C250? - Answers Under the dash
3. All switches illustrated in schematics are - Answers Shown in their normal position
4. When testing a relay using an ohmmeter, which two terminals should be touched to measure the
coil resistance? - Answers 86 and 85
5. Technician A says that a good relay should measure between 60 and 100 ohms across the coil
terminals. Technician B says that OL should be displayed on an ohmmeter when touching terminals 30
and 87. Which technician is correct? - Answers Both Technicians
6. Which relay terminal is the normally closed (N.C.) terminal? - Answers 87a
7. Technician A says that there is often more than one circuit being protected by each fuse. Technician
B says that more one circuit often shares a single ground connector. Which technician is correct? -
Answers Both A nor B
8. Two technicians are discussing finding a short-to-ground using a test light. Technician A says that
test light connected in place of the fuse, will light when the circuit that has the short is disconnected.
Technician B says that the test light should be connected to the positive (+) and negative (-) terminals
of the battery during this test. Which technician is correct? - Answers Neither Technician
9. A short circuit can be located using a . - Answers Test light, Gauss gauge and Tone generator
10. For an electrical device to operate, it must have . - Answers Power and a ground
Coil- - Answers is a device that provides the magnetic pull to a movable armature (arm)
Double-pole, double-throw (DPDT)- - Answers a switch that has six-terminals-three for each pole
Double-pole, single-throw (DPST)- - Answers a switch has two positions (off and on) an can control
two separate circuits
Gauss gauge- - Answers is a handheld meter that responds to weak magnetic fields. It is used to
observe pulsing magnetic fields, which is indicated on the gauge as needle movement
Momentary switch- - Answers is a switch primarily used to send a voltage signal to a module or
controller to request that a device be turned on or off
Normally open (N.C.)- - Answers this type of switch is not connected to its internal contacts and no
current will flow
Normally closed (N.O.)- - Answers this type of switch is electrically connected to its internal contacts
and current will flow through the switch
Poles- - Answers refers to the number of circuits completed by the switch
Relay- - Answers is an electromagnetic switch that uses a movable arm
1. List the numbers used on schematics to indicate grounds, splices, and connectors and where they
are used in the vehicle. - Answers Grounds, splices and connectors numbers listed on a schematic are
305 for ground located in the passenger compartment,
102 for connectors located under the hood
202 located under the dash
2. List and identify the terminals of a typical ISO type relay. - Answers 86-Power side of the coil
85-Ground side of the coil
30-Switch power for the relay
87-Normally open output (N.O)
87a-Normally closed output (N.C)
3. List three methods that can be used to help locate a short circuit. - Answers Test Light Method,
Ohmmeter Method and Gauss Gauge Method
4. How can a tone generator be used to locate a short circuit? - Answers A tone will be generated as
long as there is a continuous electrical path along the circuit. The signal will stop if there is a short-to-
ground or an open in the circuit
1. On a wiring diagram, S110 with a ".8 BRN/BLK" means - Answers a Splice of a brown with black
stripe, wire size being 0.8mm2 (18 gauge AWG)
2. Where is connector C250? - Answers Under the dash
3. All switches illustrated in schematics are - Answers Shown in their normal position
4. When testing a relay using an ohmmeter, which two terminals should be touched to measure the
coil resistance? - Answers 86 and 85
5. Technician A says that a good relay should measure between 60 and 100 ohms across the coil
terminals. Technician B says that OL should be displayed on an ohmmeter when touching terminals 30
and 87. Which technician is correct? - Answers Both Technicians
6. Which relay terminal is the normally closed (N.C.) terminal? - Answers 87a
7. Technician A says that there is often more than one circuit being protected by each fuse. Technician
B says that more one circuit often shares a single ground connector. Which technician is correct? -
Answers Both A nor B
8. Two technicians are discussing finding a short-to-ground using a test light. Technician A says that
test light connected in place of the fuse, will light when the circuit that has the short is disconnected.
Technician B says that the test light should be connected to the positive (+) and negative (-) terminals
of the battery during this test. Which technician is correct? - Answers Neither Technician
9. A short circuit can be located using a . - Answers Test light, Gauss gauge and Tone generator
10. For an electrical device to operate, it must have . - Answers Power and a ground
Coil- - Answers is a device that provides the magnetic pull to a movable armature (arm)
Double-pole, double-throw (DPDT)- - Answers a switch that has six-terminals-three for each pole
Double-pole, single-throw (DPST)- - Answers a switch has two positions (off and on) an can control
two separate circuits
Gauss gauge- - Answers is a handheld meter that responds to weak magnetic fields. It is used to
observe pulsing magnetic fields, which is indicated on the gauge as needle movement
Momentary switch- - Answers is a switch primarily used to send a voltage signal to a module or
controller to request that a device be turned on or off
Normally open (N.C.)- - Answers this type of switch is not connected to its internal contacts and no
current will flow
Normally closed (N.O.)- - Answers this type of switch is electrically connected to its internal contacts
and current will flow through the switch
Poles- - Answers refers to the number of circuits completed by the switch
Relay- - Answers is an electromagnetic switch that uses a movable arm
