The Mack Turn Signal is a reliable and practical replacement for OEM# 1MR3412; 1MR3412P2. With its 12V standard and factory-matched connectors, it offers a hassle-free plug-and-play control switch replacement. The control switch wire leads are protected by convoluted tubing, ensuring durability. This heavy-duty unitized construction exceeds Class A, SAE, QQC, and FMVSS108 specs, guaranteeing top-notch performance. The positive detent provides a better "driver feel" when signaling, while the integrated stop lamp circuitry adds an extra layer of safety. Suitable for multiple Mack truck applications, this Mack Turn Signal is a must-have for any truck owner.