A positive ground system works by directly connecting the chassis of a vehicle to the positive side of the vehicle's battery. This system effectively earths the vehicle as the chassis attaches to the battery using a positive battery cable. The cable is tethered to the battery at one end and the engine block at the other.Continue Reading
The positive ground method was common before the year 1954, and many vintage or classic cars, especially those from the United Kingdom, adopted the positive grounding system. Most modern vehicles use a negative ground system that involves wiring the vehicle chassis to the negative side of the battery, and this has many advantages over positive ground systems.
Negative ground systems allow the driver to plug electrical devices into their vehicles, and this is especially useful for modern commuters that make use of devices like GPS systems or wish to charge a smartphone using a cigarette lighter of USB attachment.
The evolution of the less functional positive ground system is easily explained, as before the invention of PVC-insulated plastic wiring in the 1960s, live wires were covered with cloth insulation that performed poorly in the damp conditions found in the U.K. and other European nations.
Damp insulation would often corrode, but positively grounded wires are noticeably more resilient to the elements, which led to the propensity of positive ground system wiring in older vehicles.Learn more about Car Parts & Maintenance
To use a steering wheel puller to remove a steering wheel, first disconnect the ground wire from the vehicle's battery. Next, disassemble the wheel, removing horn wiring, buttons and turn signal actuators. Remove the horn ring by pushing its center and releasing the spring that holds it in place; ensure that the parts stay together by removing it slowly. Turn the steering wheel to the center position and remove the nut with an adjustable wrench or appropriately sized socket.Full Answer >
Removing a fuel filter on a Ford Expedition requires the battery to be disconnected, the fuel pressure released and the vehicle safely raised from the ground. Once the vehicle is secured from the ground the filter can safely be changed.Full Answer >
To replace a bad starter motor, first determine where the starter is located in the vehicle, and then remove the battery ground before removing the block assembly. If the starter is damaged, the ring gear connected to it may have damaged teeth; inspect that as well.Full Answer >
An automotive battery size chart shows a consumer information to help him know whether a replacement battery works for a particular vehicle. It includes information such as physical dimensions, weight, voltage, energy capacity and charge current. Often, the chart also gives compatability recommendations.Full Answer >