Exam 4: Wiring and Circuit Diagramswiring Repair and Reading Circuit Diagrams

Why are stranded cooper wires used instead of solid copper wire?

______________________________ complete the return path to the battery between components that are insulated.

Technician A says that wiring harnesses pass from the passenger compartment to the engine compartment through bulkhead connectors. Technician B says a wire harness is a group of wires that branches out to various electrical components. Who is correct?

In most color codes, the first group of letters designates the __________ __________ of the insulation. The second group of letters indicates the color of the __________.

Technician A says a wiring diagram indicates where circuits receive their voltage source and the color of the wires used in the circuit. Technician B says a wiring diagram indicates what circuits are interconnected and gives the location of the electrical components. Who is correct?

Explain why automobile manufacturers color code wires in the electrical system.

Most ____ use printed circuit boards as circuit conductors.

Technician A says the VIN number will help to determine the correct wiring diagram to use for diagnosis. Technician B says each automobile model may have a different wiring diagram. Who is correct?

A switch is drawn on a wiring diagram with "NC" printed beside it. What does this indicate?

Lt Grn is printed next to a wire on a wiring diagram. This is the color of the wire on the vehicle.

An operative radiator fan needs to be repaired. Technician A says a single circuit-type wiring diagram would be the simplest diagram to use. Technician B says a component locator will probably be needed to repair this circuit. Who is correct?

Explain at what point during an electrical repair would component, splice, ground, and connector locators be used.

A wiring diagram illustrates three wires that are joined together at "C-215." Technician A says the wires are connected together at connector C-215. Technician B says the three wires are part of circuit 215. Who is correct?

Technician A says a wiring diagram is an excellent tool in locating circuit failures. Technician B says in most cases a wiring diagram is not necessary to locate circuit failures. Who is correct?

What does a dotted line between connectors indicate?

Dotted lines between switch wipers indicate that all wipers will move together.

Once it is determined that the battery is operating correctly, the ____ should always be the starting point in troubleshooting an electrical system.

What are the factors concerning wire size selection that need to be considered when adding an accessory?

Technician A says it may be necessary to route a new wire to bypass a damaged conductor. Technician B says to install a grommet anytime a wire passes through the body. Who is correct?

____ wiring is the term used for conductors used for low voltage circuits.