What does an ignition ballast resistor do?
What does an ignition ballast resistor do?
The ballast resistor allows the ignition system to operate at a lower voltage until the engine starts. After ignition, the alternator begins to recharge the battery, restoring the regular voltage.
What causes a ballast resistor to fail?
What causes a ballast resistor to fail? The resistance through the ballast resistor varies with current flow which varies with engine rpm. This naturally causes the resistor to expand and contract from heat. That’s why they eventually fail.
What does a 12 volt ballast resistor do?
A ballast resistor is a device in your vehicle that limits the amount of current in an electric circuit. The ballast resistor is commonly found in older vehicles, because they did not have the benefit of circuit boards found in most of today’s vehicles.
Do I need a ballast resistor?
So does your application require a ballast resistor? Quite simply, if your distributor has breaker points the answer is yes; if not, the answer is no. See all 7 photos 2 Older points-style ignition system used a single resistor which reduced amperage to the coil resulting in extended life for the coil and points.
How do you know if a ballast resistor is bad?
Measure the voltage (or check with a test light) the voltage between the single wire and ground. If there is power there, the ballast resistor is likely bad. Reconnect the wires and measure the voltage at the positive side of the coil. If you see 8-13 volts, you may have a bad coil.
Why is my ballast resistor smoking?
the ballast WILL heat up. Any grease, oil, etc WILL cause it to smoke. IF you have points it is VERY HARD on them to leave the key on for a length of time.
Does PerTronix coil need a ballast resistor?
Todd, since you need a new coil, I would suggest you buy the PerTronix 1.5ohm coil part #40001 for chrome or #40011 for black and run without a ballast resistor. This is providing you have the original Ignitor. If you have the Ignitor II (better unit), then use part #45001 for chrome or #45011 for Black which is a .
Why do some coils have a ballast resistor?
A Ballast Resistor is an electrical device that reduces voltage to the coil so that more energy is available for the spark plugs during starting. Why would a Ballast Resistor be fitted in a car? To counteract this distribution of energy, ignition systems were changed to use a 9v coil instead of a 12v coil.
Will a bad ballast resistor cause no spark?
Yes, a blown ballast can bugger up the spark, what kind of distributor are you using.
How is a ballast resistor used in a network?
A ballast resistor is used in a device to compensate for changes and secure the other components of a network. When the current flowing through the resistor increase, the temperature also increases. And due to the temperature rise, the resistance also increases. Therefore, an increase in resistance limits the current flowing through the network.
How does the resistance of a ballast change?
Electric ballasts can be resistors, capacitors, inductors, or a combination of these. Ballast resistors are able to change resistance with the current. If the current flowing through the resistor increases above the threshold value, the resistance increases. The resistance can then correspondingly decrease as the current decreases.
What are the symptoms of a bad ballast resistor?
Over time, the ballast resistor can be damaged by normal wear and tear, so there are a few things to look for when you suspect a bad or failing ballast resistor needs servicing. The most obvious symptoms will be the vehicle starts, but then immediately dies as soon as you release the key.
How many volts does a ballast coil need?
A ballast coil should read around 1.5 Ohms or around 6 volts. (maximum 3.4 Ohms is ideal for our systems) Which coil should I use if my car has a ballast resistor? Using a non-ballasted coil would mean that you are running a 12v coil on a 9v feed, resulting in a weak spark.
