[Scott] was driving in the pouring rain behind a car with its blinkers on when ... it reads a series of flashing lights from your computer screen in order to ‘synchronize’ the unit for each ...

The manual advises the light should turn off once the car reaches a speed just above idle. Should it start flashing while traveling above 20 mph, it means the battery isn't being charged.

Back in the day, though, things like brake lights and indicators were all done with analog electronics. If your classic car needs a good ... to create the desired flashing behavior.

In many cases, however, this isn't likely to be a major issue, especially if you don't notice any changes in your car's overall performance. Blinking and turning off of a check engine light can be ...