DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [10/2013 - ]: Wiring Diagram

WARNING: This page is about a different car, the 2014 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

w/ Seat Position Memory

Fig 1: Turn Signal / Hazard Flasher (w/ Seat Position Memory) Wiring Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
w/o Seat Position Memory

Fig 2: Turn Signal / Hazard Flasher (w/o Seat Position Memory) Wiring Diagram
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002