What makes your vehicle go… Starting & Charging What makes your vehicle go…

Some of the parts required… Battery Starter Alternator Fuse/relay box Ignition switch

The Battery Most modern vehicles use a 12 volt system A 12V battery will have 6 cells, each producing about 2 volts Positive (+) and Negative (-) terminals

The Starter An electric motor that is controlled by the key switch This small motor has a gear that contacts the ring gear to crank the engine over Takes power directly from the battery, and a switch wire from the key

The Alternator Produces electricity for the vehicle Maintains the charge level of the battery Driven by a belt from the crank pulley

Fuse and Relay Box All of the electricity comes through here Relays are switches that operate ‘large draw’ items Headlights Starter Driving lights Usually located under the hood, or on the firewall under the dash

Fuse and Relay Box pt.2 Fuses are safeguards against ‘dead shorts’ Are rated in ‘amps’, which is a measure of the amount of current the fuse will let through The larger the number, the greater the amps The high amp fuses will let more electricity flow

The Ignition Switch Turns electricity on and off for the vehicle Made more secure by adding a key to turn the switch Activates many other systems in addition to just stating the vehicle

What have we learned? Battery Starter Alternator Fuse and relay box Ignition switch

Assignment Chapter 31 (p.517) Review questions 1-15 (p.527-528) &