What is connector C911?

C911 (BK) is the 7-pin female connector on harness 14334 that connects to the auto-dimming interior mirror unit (17700).

Which pin on C911 supplies power to the auto-dimming mirror?

Pin 1, circuit 1003 (GY/YE wire), supplies voltage in Start and Run and is overload protected.

Which pin is ground on the auto-dimming mirror connector?

Pin 2, circuit 1205 (BK wire), is the ground.

What does pin 3 of C911 do?

Pin 3, circuit 140 (BK/PK wire), supplies voltage in reverse.

Are all seven pins of C911 used?

No. Only pins 1–3 are used; pins 4, 5, 6, and 7 are listed as not used.

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Ford C911 Connector Pinout - Auto-Dimming Interior Mirror Wiring (17700)

C911 female connector pinout for auto-dimming mirror with seven-pin circuit table

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Connector pinout diagram for the C911 female auto-dimming mirror connector with a seven-pin circuit and function table.

AI caption March 2007 · Photo 109 of 118

This document is a connector pinout page from a Ford wiring/connector reference showing connector C911 (BK, black), part of harness 14334, which mates to the auto-dimming interior mirror unit (base part number 17700). A drawing depicts the 7-cavity female connector with pin positions numbered 7 through 1. A table lists each pin's circuit number, wire color, and function: Pin 1 uses circuit 1003 (gray/yellow wire) and supplies voltage in Start and Run (overload protected); Pin 2 uses circuit 1205 (black wire) for ground; Pin 3 uses circuit 140 (black/pink wire) and supplies voltage in reverse; Pins 4 through 7 are not used. This page is useful for anyone diagnosing, repairing, or retrofitting an auto-dimming rearview mirror—for example, testing for switched power at pin 1, ground at pin 2, and the reverse signal at pin 3 that disables mirror dimming when backing up. The page was uploaded to a 2002 Ford Excursion gallery alongside other rear-mirror wiring pages, though the document itself does not state a year or model.

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Frequently asked questions

What is connector C911?: C911 (BK) is the 7-pin female connector on harness 14334 that connects to the auto-dimming interior mirror unit (17700).
Which pin on C911 supplies power to the auto-dimming mirror?: Pin 1, circuit 1003 (GY/YE wire), supplies voltage in Start and Run and is overload protected.
Which pin is ground on the auto-dimming mirror connector?: Pin 2, circuit 1205 (BK wire), is the ground.
What does pin 3 of C911 do?: Pin 3, circuit 140 (BK/PK wire), supplies voltage in reverse.
Are all seven pins of C911 used?: No. Only pins 1–3 are used; pins 4, 5, 6, and 7 are listed as not used.