All the current? If they are in series, the same current flows through them.John1397 said:... will the headlamp being that it is higher wattage cause all the current flow thru ...
The purpose of having an old 6 volt auto headlight in series with a 1154 on 12 volts is to create a voltage divider circuit. This allows the 12 volts from the battery to be divided between the two components, with the majority of the voltage going to the 1154 bulb. This effectively reduces the voltage to the headlight to 6 volts, which is the appropriate voltage for it to function properly.
A voltage divider circuit works by using resistors in series to divide the voltage from a power source. The voltage is divided proportionally based on the resistance of each resistor. In this case, the 1154 bulb acts as the resistor, with the headlight having a higher resistance and therefore receiving a lower voltage.
Yes, it is possible for this setup to damage the components if the voltage is not properly divided. If the resistance of the headlight is too low, it can cause the 1154 bulb to receive too much voltage and burn out. It is important to ensure that the headlight has a higher resistance than the 1154 bulb to prevent damage.
One benefit of using this setup is that it allows for the use of a 6 volt headlight in a 12 volt system. This is useful for vintage cars or other vehicles that may have a 6 volt electrical system. It also helps to reduce the amount of heat generated by the headlight, which can increase its lifespan.
No, it is not necessary to use this setup. There are other methods for reducing the voltage to a 6 volt headlight, such as using a voltage regulator or using a different type of bulb. This setup is just one option for achieving the appropriate voltage for the headlight to function properly.