Flasher Unit

[bkasl]

Is their a correlation between the brightness of the bulbs and flasher unit?

 

[Tom H]

There s a correlation between the current going through the bulbs and the rate of flashing. Generally, but not always, a brighter incandescent bulb uses more current. An LED bulb usually draws less current but is brighter.

 

[mikephillips]

And if it starts flashing much quicker, then you probably have a bulb out for some reason

 

[RootesRacer]

Tom almost hit on it and Mike Phillips also has it right too but the higher the bulb current, the slower the flash rate. Led bulbs may not use enough current to even cycle these old thermal flasher units used in our cars. A slight load (some lights burned out or disconnected) will usually result in a faster flash rate. If all bulbs are disconnected, the flasher wont even run.