Editing How do turn signals work? (section)
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==Function== In review, the system works in the following manner. When no turn signal is selected, both brake lamps will receive power when the pedal is pushed. When the left turn signal is selected, the brake lamp for the left side is disabled by the turn signal switch, and the bulb now receives power from the flash unit. At the same time, no change has been made to the right side brake lamp. The result: left lamp flashing, right lamp steady with brakes on. Right lamp is out when brakes are off. Now, switch to the right side. The reverse becomes true: the right side brake lamp is disabled, and power to the lamp is now provided by the flash unit. Brakes on or off: the left side remains on (no change to the left side) steady with brake power, and off without it. This is how the two systems are isolated. This is the most problematic issue for a novice to understand, primarily because nobody ever took the time to explain it to them in any detail.
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