Are ignition coils AC or DC?
Car ignition coils take 12v dc and transform it into whatever kV needed to create a spark.
Where is the ignition coil on a motorcycle?
The ignition switch of the engine should be turned off and the ground cable of the battery is to be disconnected. In order to access the spark plugs and coil, remove the bike seat as well as the fuel tank. There are some bikes where the ignition coil is located under the flywheel and those are mostly mopeds.
Which is Bosch terminal leads to the battery?
4a 4b Ignition distributor with two insulated circuits Terminal 4, from coil I Terminal 4, from coil II 15 Switch-controlled plus downstream from battery (from ignition switch) 15a In-line resistor terminal leading to coil and starter 17 19 Glow-plug switch Start Preglow 30 Line from battery positive terminal (direct)
What is the purpose of the ignition coil?
The main purpose of the ignition coil is to step up the low battery voltage to high which is needed to spark plug. It is advised to test the coil when the coil is hot.
Which is the positive side of the coil?
If post are color like gold copper brass = positive… While silver is usually negative.. It does make a difference. Reversing the polarity on the primary side changes whether the spark will jump from the shell electrode to the center post tip or from the center post tip to the shell electrode.
What are the terminals on an ignition coil?
The side terminals of the coil are marked positive (+) and negative (–) and these are where you can measure the resistance of the primary windings. Set the multimeter to the 200-ohm setting and attach the meter’s leads corresponding to the terminal markings, red being positive and black being negative.
How does a 12 volt ignition coil work?
If your car uses a 12 volt battery, the 12 volts you put into the primary side of the coil will exit the secondary side as 30,000 volts! The high voltage is carried away from the coil by a high-tension cable that looks like a short piece of spark plug cable and runs to the distributor tower.
What should the resistance of an ignition coil be?
Switch the meter’s resistance range to the 20K-ohm setting and attach the negative (black) meter lead to the center terminal of the coil. The reading here should be 11.00 or better, with 13.49 being about normal. If your coil reads under 11.00, then chances are pretty good that this is the reason you’re not getting any spark or a very weak one.
Where is the primary winding on an ignition coil?
If your car uses a negative ground and you have a coil with primary and secondary terminals, the primary winding is connected to the terminal on the coil that is marked “+” or “Bat.” This is the terminal that receives voltage from the battery.