He’s using an ATtiny24 microprocessor to interpret the logic from the vehicle and then translate the turn signal and tail light data into a signal for the additional side indicators.

Truck-Lite says its new Super 60 STS amber six-inch oval LED side turn signal and marker lamp is the first of its kind to exceed all standards for both types of lights. Previously, LED side turn lamps ...

Tapping in to the turn signal wiring is relatively easy on this ... and then secured the wiring with cable ties, one on each side. An accessory wiring harness that allows the lights to work as running ...

Cars have lots of ways to inform you that something is off: warning lights ... ‘I heard your turn signal… ‘Your turn signal on the left hand side makes a different sound and it is telling ...

If the broken one isn’t obvious, flip the turn-signal lever to turn on the other (i.e., good) side and check to see which lights are flashing. If you intend to replace the bulb yourself, ...

the car will extinguish whichever headlight is on the same side of the car just as the flashing turn signal lights up. The two protocols are seen in Figure 1. Figure 1 A look at the two turn signal ...