What should the voltage be at the coil?
The voltage reaching the coil may be 12 volts , or about 7 volts if the coil has a ballast resistor . Most electrical equipment works on 12 volts, but most modern cars have a resistor in the ignition system to assist starting. The coil in a ballast-resistor system is rated at 7-8 volts instead of 12 volts.
What is the output voltage of an ignition coil?
The opening induction voltage of the primary winding is between 300 and 400 V. The high voltage on the secondary coil can be up to 40 kV, depending on the ignition coil.
How many amps should an ignition coil draw?
Ignition Coil (single oil-filled coil older vehicle) – 3 to 4 amps. Ignition Coil (single DIS coil newer vehicle) – 5 to 6 amps at peak output. Ignition Coil (coil-on-plug) – 6 amps per coil at peak output.
How much current does a coil pack draw?
Following Ohm’s law for the conversion of volts to amperes, oil-filled coils generally require 3 to 5 amperes of primary current to produce 20,000-30,000 volts of secondary current.
How many volts does a 12v coil produce?
The coil becomes a transformer, stepping the voltage up. 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!
How do you check voltage on a coil?
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We're going to talk about a coil primary voltage test right now. So the vehicle hooked up already I have the number one lead attached to the ground side of the coil.
How do I test a coil pack with a multimeter?
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That's one before you start the car and then you get grab your multimeter. Put it on DC voltage. Ground your black test lead and then on the connector. Side you start checking for voltage.
How much voltage does a spark plug produce?
Spark plugs usually require voltage of 12,000–25,000 volts or more to ‘fire’ properly, although it can go up to 45,000 volts. They supply higher current during the discharge process resulting in a hotter and longer-duration spark.
How do you check an ignition coil with a multimeter?
Connect the multimeter to the negative and positive terminals of the ignition coil to get a primary circuit reading. If the multimeter shows a reading of 0 ohms, the ignition coil has shorted and needs replacing.
How many amps does a 12V ignition coil draw?
Either 12V across a 3-ohm primary coil or 6-9V across 1.5 ohms in a ballast coil. Either way, somewhere in the 4-6 amp range while the car is running. If you have a ballast coil (e.g. runs on 6 or 9V) that bypasses the ballast resistor when starting the engine, you could get higher amps (12V over 1.5ohms = 8Amps).
How many amps does a 12V relay coil draw?
The coil of a relay passes a relatively large current, typically 30mA for a 12V relay, but it can be as much as 100mA for relays designed to operate from lower voltages.
How many amps does a 6 volt coil draw?
A 6 volt coil will draw 4 amps. If you have an accurate ohm meter, reading across the posts of a 12 volt coil should be about 3 ohms. A 6 volt coil is about half of that.
Can you use a 12v coil on a 6v system?
You can run a 1.5 ohm “12 volt coil” on a 6 volt car without a ballast resistor and it will run great. Some “12 volt coils” read out at about 3 ohms and can really only be used on a 12 volt car. The spark out of this “12 volt coil” when used on a 6 volt car will be very weak.
How do you tell if you have a 6 volt or 12 volt system?
It may be marked also. If you have a 6 volt battery, try to start it with that. If it is supposed to be 12 volts it will crank real slow or not at all. A 12 volt battery might burn up a 6 volt generator and condensor.