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.

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 ...

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 ...

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, ...

When I started to drive it in the fall, the driver's side turn signal worked fine until I turned on the headlights. With the lights on, it's only half as bright and blinks twice as fast.