Electrical Service Flashcards
What are the 5 things required to make a electrical circuit?
Voltage source Conductors, Control device (switch) Over-current protection device Load
Series circuit
The sum of the resistance values of all components in circuit forms the total resistance.
Sum of all voltage drops equals the source voltage
Ohms law
E=IxR
Parallel
Current total is sum of a individual currents. Resistance total is less then smallest resistance. Voltage supplied to all leg is the same
What is specific gravity of fully charged battery?
1.265
When testing a battery the total variation between cells and be how much?
50 points
What are the common electrical faults? (4)
Opens
High resistance
Short to voltage
Short to Ground
What 3 things can be used to repair conductor insulation?
Electrical tape
Liquid tape
heat shrink tubing
What is considered the strongest type of wire repair?
Western union splice
What is the first step when trouble shooting a electrical issue?
Check source voltage
What are the 3 styles of dash displays?
Liquid crystal display (LCD)
Light emitting diode display (LED)
Vacuum fluorescent display
Multiplexing (def)
Sending multiple electronic messages through the same signal path at the same time
What are the common communication data buses
J - 1708/1587
J - 1939
J - 560
What current protection do modules on the multiplexed network have?
20 Amps internal current overload protection
Where is the SRS module normally located?
Under or behind the drivers seat
What are used in the SRS wiring connectors to prevent accidental deployment when servicing.
Shorting bars
All electrical schematics are drawn in a _______________ condition and all the electrical components are drawn in their ______________ position
De-energized
Normal position
Voltage drops from high resistances will do what to bulbs?
Cause them to illuminate dimly
Manufacturers develop and publish ___________ _______ to guide you through trouble-shooting procedures.
Flow charts
In a multiplexed module system the module are known as?
Nodes
The Bus wire of a multiplexed system are known as?
The Backbone