Transcript Vehicle Identification Number

Intro to Automotives
Basics of Electricity
 Definition:
 The movement of electrons in a conductor.
Terms
Voltage:
Is the electrical pressure that causes current to flow.
Current:
The quantity of electrons moving through a conductor.
Resistance:
Is measured in ohms, usually the load, such as a light.
OHMS LAW:
Voltage = Current X Resistance
Battery
 Stores Chemical Energy
 Supply electrical energy to the
starter
 Supplement the alternator
 Lights
 Radio
 Etc.
Key Switch
 Connects or disconnects
electrical current from
flowing.
 Completes the circuit to the
solenoid starter
Solenoid
 Electrical Switch
 Changes low current to
high current
Starter
 Converts electrical energy
into mechanical energy
 Connected to the flywheel
gears, which is connected to
the crankshaft, which moves
the pistons
Neutral Safety Switch
 Keeps vehicle from
starting while in gear
 Allows current to flow in
starting system when in
“PARK”
Common Starting System Problems
 Bad/Worn out starter or solenoid
 Dead Battery
 Short circuited or broken wire
Charging System
•The reverse of the starting system
•Recharges the battery
•Energy Conversion
Mechanical
Electrical
Chemical
•Consists of four (4) main components
Drive Belt
 Connects crankshaft to Alternator
 Sometimes connected to…
 Power steering pump
 Water pump
 Air conditioning
 2 types of belts…
 Serpentine
 “V”- belts
Serpentine Belt
 Multi-ribbed
 Grooves run parallel
 Replace every 50,000
miles
V-belts
 Usually narrow
 Cross-section looks like a
“V”
 Replace every 25,000
miles
Alternator
 Converts mechanical
energy to electric
energy
 Does both AC & DC
Battery
 Stores Chemical Energy
 12-volt DC
 Converts electrical energy to
chemical energy
 Supplements the alternator
 Lights
 Radio
 Etc.
Voltage Regulator
 Located in or near the alternator
 Regulates the Voltage
 Should be about 14.5 volts while the engine is running
Fuses
 Located in the junction block
 Rated in Amps 5,10, 15, etc…
 2 types of fuzzes
 Glass Cylinder
 Blade
Headlights
 Headlights
 Sealed Beam
 Composite
 Halogen
 Filled with gas
Questions/Discussion…