If other door features work, like or electric mirror adjustment
While the B166A-60 code will not affect the drivability or performance of your Ford vehicle, repairing it ensures that visibility remains uncompromised during adverse winter or rainy conditions. In the vast majority of cases, a budget-friendly replacement of the mirror glass or a quick wiring splice in the door jam will resolve the issue and permanently clear the code.
Unlike standard rubber mats, these "tub-style" liners are engineered to handle the rugged lifestyle of an off-road vehicle. Here is a blog post breakdown of why this specific accessory is a must-have for Bronco owners.
If the mirror glass is good, check the wires inside the rubber boot located in the door hinge. Due to repeated flexing, these wires can snap, resulting in an open circuit. Conclusion
If voltage is missing at the mirror tips, pull back the protective rubber boot located in the passenger door hinge gap. Inspect the bundle of wires closely for any green corrosion, frayed insulation, or severed wires. How to Fix and Resolve Code B166A:60 Diagnosed Issue Corrective Action Difficulty Level
Some possible symptoms associated with the B166A60 code include:
: Check the mirror glass for cracks and inspect the wiring behind the mirror for loose connections. Multimeter Testing :
Resolving this code requires a systematic approach to pinpointing where the electrical break is located. Step 1: Verify the Fault Location
This sub-code signifies a specific failure type—in this case, an Open Circuit —and confirms that the state is active during testing. An open circuit means there is a break in the loop, meaning electrical current cannot flow to power the heating element. Symptoms of Ford Code B166A-60
The wires running under the passenger seat experience constant flexing as the seat moves forward and back. Over time, copper strands inside the insulation break, creating high resistance or intermittent shorts. This is the of B166A60.
If the grid read "OL" during your multimeter check, buy a direct-fit replacement heated mirror lens element. Replug the two factory wires directly onto the new terminal legs, snap the glass frame squarely back onto the motor mount, and clear the historic code.
If you choose to fix it, simple replacement heated mirror glass is highly affordable and can be swapped out manually in under 10 minutes. If you are currently troubleshooting this, tell me:
: The side mirrors will fail to clear frost, ice, or fog when the rear defroster or dedicated mirror heat button is activated. Persistent Fault
This code usually appears during a scan (often using software like FORScan ) even if a "Check Engine" light is not active, as it primarily affects comfort rather than critical engine performance.