Check a 12-volt battery by disconnecting it from the device it powers, take an initial reading, charge it and take a second reading after the battery sits. Reconnect the battery, attempt to start the device and take a third reading.Know More
A fully charged 12-volt battery should read 12.66 volts. Any reading below 11.89 volts indicates a fully discharged battery.
Connect the battery to a charger, and allow it to charge completely. Allow it to sit for eight hours before testing again.
Reconnect the battery. Disconnect the ignition wire from the coil. Turn on the key for no more than 15 seconds, and read the meter. If it drops below 9.6 volts, it is bad. Batteries that remain at 9.6 volts or above are good.
The first step to picking the best 12-volt battery for a particular job is determining what dimensions and electrical capabilities the battery needs; using the wrong battery is potentially dangerous. In addition, small differences in size can cause a battery to not fit.Full Answer >
In order to test the spark, pull the spark plug from the engine, and then start the car. There should be a bright blue spark between the electrodes every time the cylinder fires, provided that there is enough voltage reaching the spark plug. The coil is likely to be faulty if there is no spark.Full Answer >
You can replace a 6-volt battery in a golf cart by removing the old battery and then connecting the new battery to the battery bracket. Thoroughly clean the battery compartment, and allow the batteries to charge through several cycles to complete the process.Full Answer >
A CDI box can be tested using a device called an ohm meter, which measures electrical resistance. The ohm meter can be attached to either input or export wires, ensuring that the CDI box is both receiving power and transmitting it.Full Answer >