Ford — B166a60

You should see roughly 12 Volts (battery/alternator voltage).

To properly isolate the point of failure without unnecessarily replacing expensive door modules or complete mirror structures, follow this systematic approach using a standard digital multimeter: 1. Perform a Visual Assessment ford b166a60

This is the core identifier for the specific circuit or component being monitored. You should see roughly 12 Volts (battery/alternator voltage)

💡 Before replacing expensive sensors, check your tail light assemblies . Many Ford BLIS sensors are housed inside the tail lights, and a simple loose connector there can trigger the B166A60 code. If you'd like to narrow this down, let me know: Your vehicle model and year (e.g., 2021 F-150) Any recent repairs or accidents If you have an OBDII scanner handy Share public link 💡 Before replacing expensive sensors, check your tail

: Check your owner's manual for the fuse associated with the Door Modules or Power Mirrors . If the fuse is blown, neither mirror will likely work.