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Ballast Resistor

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Symptoms of a Bad or Failing Ballast Resistor
Common signs are the vehicle not starting or starting but immediately dying. Only a professional mechanic should handle the ballast resistor.
How Long Does a Ballast Resistor Last?
A ballast resistor is a component in the ignition system of older vehicles. If you drive a classic, you are familiar with coils and points. You don’t have an onboard computer, and...
How to Replace a Ballast Resistor
The ignition coil cannot get proper voltage if the ballast resistor is broken. Signs are a crank without a start or a start and an immediate stall.

Related questions

Question
Headlight going off
There are 3 items in the xenon light circuit responsible for igniting the bulb. According to Infiniti's TSB on xenon light, they recommend replacing the bulb first, and that will solve most problems. The HID control unit, and the...
Question
I own a Cadillac 2012 SRX whose driver-side headlight is dimmer than the passenger side.
Hi there. With having one headlight dimmer than the other and having the light bulb replaced with a new bulb and still having the same result, then I recommend replacing the ballast resister for the headlight that is dimmer. This...
Question
my headlights are not working again.
Hi there. If the headlights are burning out a few days after replacing them, there could be an electrical short in the wiring for the lights causing them to overheat or the ballast resistor is not working causing the headlights...
Question
My headlights doesn't seem to work good.
The issue with your lights is the ballast resistor is not working properly. Ballast resistors are designed to monitor the amount of voltage to the headlights. If the lights are dimming out and then not working, then the ballast resistor...
Question
When I turn my headlights on my windshield wipers come on and they don't stop. Also the right side headlight get very dim.
Check the ballast resistor for the headlights and see if it has a burned wire or loose connection. If not, then the ballast resistor needs replaced for the headlights. A ballast resistor will balance the power to the headlights ensuring...
Question
My Interior light won't turn on like the gauges and radio screen.
The interior lights are on a timer in the vehicle. This timer is a Ballast resistor that keeps the lights on for a short period of time when the doors are shut. The resistor maybe shorting out causing the lights...

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