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On a point ignition system, the resistor will reduce the incoming voltage to the coil from 14 volts when the charging system is active, to about 9 volts. At a 9 volt level the ignition points will survive for a longer time before pitting and burning.
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actually this is for the fact that when you are starting (the starter is running) a car/truck available voltage drops down because of the electrical load from the starter to about 9 volts. this would be a problem if the ignition system (coil and points/ignition module) was set for 12~14 volts as at 9 volts you may have no spark, so they set the voltage at 9 volts all the time and use the resistor or a built in voltage regulator in the ignition module to bring the voltage down when the car is running and give it full voltage (9 volts) directly when the car is starting usually thru a bypass wire or switched connector.
the condenser/capacitor is what keeps the points from pitting and burning as fast.
and on some cars they did not use a resistor but a resistor wire
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∙ 14y ago
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I have replaced everything involved in my ignition system but still lose spark after driving for a short period of time if you le tit sit for an hour it will restart again any suggestions?
did you have your ignition coil replaced? the signs are that the ignition coil is overheating thus you are able to restart after an hour, when the coil cools. also check if your ignition coil has a resistor. if it has, have it checked for continuity. did you have your ignition coil replaced? the signs are that the ignition coil is overheating thus you are able to restart after an hour, when the coil cools. also check if your ignition coil has a resistor. if it has, have it checked for continuity.
When is the resistor bypass used in the ignition circuit?
The resistor bypass in the ignition circuit is used when starting the engine. It bypasses the resistor to provide full battery voltage to the ignition coil, ensuring a strong spark for a quick and reliable engine start. Once the engine is running, the bypass is no longer needed and the resistor is re-engaged to limit the voltage to the ignition coil for normal operation.
Where is the porcelin ignition ballist resistor for 1986 dodge half ton?
ballast resistor should be on the firewall under the hood. just follow the wires from the coil and you will find it
Why reduce voltage from a ignition coil by putting a resistor in the spark plug?
Sometimes a resistor is installed in spark plug wire as a supressor to reduce radio static interference
Is the ignition coil resistor necessary?
Yes definitely it is necessary because when u crank the engine at that time ignition coil is in cold position so at that time complete 12 volts bypasses the ballast resistor but when u releases the key from cranking position so the key comes to the ignition position at that position 12 volt of battery goes through the resistor that may be approximately 9 volt because when engine starts the coil temperature increases and there is no need of 12 volts
Where is the ballast resistor for a 1994 Jeep Cherokee?
It does not have an ignition ballast resistor.It does not have an ignition ballast resistor.
Does a Chrysler 5th ave 88 have ballast resistor?
yes its located on the p/s firewall next to the ignition coil
Why does your 79 cj only have 10 volts at the coil while running?
The ignition only needs 12 volts for starting. You`re wiring harness has a resistance wire or ballast resistor to drop the voltage to keep the ignition coil from burning up.
Where is THE ignition coil resister located on a 1967 Chevelle?
look for the small braded wire coming out of the fusebox under the hood and that is the resistor wire.
Where is the Ignition Coil Resistor locaed on a 78 ford E150?
The van should have electronic ignition, resistors are built into the ignition module and cannot be serviced. The module is located on the left inner fender below the master cylinder.
Why would an ignition coil keep burning out on a 1971 Barracuda with electronic ignition?
Make sure you have only about 8 volts going to it not a full 12. There is a resistor wire that should cut the voltage.
Where is the ignition coil on a 96 civic cx hatchback?
The ignition coil is inside the ignition distributor.
