B1683 — Mirror Driver/Passenger Switch Circuit Failure #

Note: The exact description of code B1683 may vary depending on the vehicle manufacturer. Refer to your OEM documentation for precise wording.

• Ford: Mirror Driver/Passenger Switch Circuit Failure
• GM: Mirror Switch Circuit Malfunction
• Toyota: Power Mirror Switch Circuit Fault
• Chrysler: Mirror Selector Switch Electrical Failure

Summary of code B1683 #

The B1683 code indicates a malfunction in the electrical circuit associated with the mirror selector switch, which allows the driver to toggle between adjusting the left or right side mirror. This switch is part of the vehicle’s interior electronics network, commonly linked to the door control module and, in some models, the body control module (BCM). When the vehicle’s On-Board Diagnostics (OBD-II) or European On-Board Diagnostics (EOBD) system detects a problem in the switch circuit—such as an open, short, or unexpected voltage—it triggers code B1683. While not directly affecting engine performance, this issue can impact driver comfort and safety, especially in vehicles where mirror adjustments are critical for visibility. Diagnosing this code requires careful attention to the switch, wiring, and related modules.

Common symptoms for code B1683 #

A B1683 fault typically makes itself known through issues with the power mirrors. If the mirror selector switch circuit fails, you may notice several telltale signs. While the vehicle remains drivable, these symptoms can impair mirror adjustment, reducing convenience and potentially creating blind spots.

• Side mirrors do not respond to adjustment attempts
• Only one mirror adjusts, regardless of selector switch position
• Mirrors may move erratically or become stuck
• Intermittent operation of mirror controls
• Warning lights or messages on the dashboard (in some models)

Probable causes for code B1683 #

The most common root causes for code B1683 relate to electrical issues with the mirror selector switch circuit. These range from simple contact problems to more complex module failures. Proper diagnosis helps avoid unnecessary part replacements.

1. Faulty or worn mirror selector switch
2. Damaged or corroded wiring/connectors at the switch or mirror module
3. Open circuit or short to ground in the mirror switch wiring
4. Faulty power mirror motor (less common but possible)
5. Body Control Module (BCM) or door module failure (rare but possible)

Step-by-step diagnostics for code B1683 #

Diagnosing B1683 requires a systematic approach, starting with visual inspection and moving toward electrical testing. Always refer to the OEM wiring diagram specific to your model before proceeding.

• Verify the code using a professional scan tool and note any related codes (especially B or U codes).
• Visually inspect the mirror selector switch for physical damage, wear, or spills.
• Check the wiring and connectors at the switch and along the door harness for corrosion, pinched wires, or loose connections.
• Test the switch’s function using a multimeter—verify continuity and correct output when toggled.
• Inspect the related fuses and relays in the vehicle’s fuse panel.
• If wiring and switch test good, use the scan tool to check the BCM or door module for faults.
• Consult OEM service information for additional module or network tests if necessary.

Possible repairs for code B1683 #

The appropriate fix for B1683 depends on the specific issue discovered during diagnostics. Starting with the least invasive solution is recommended, and always use OEM parts when possible to ensure long-term reliability.

• Replace the mirror selector switch if found to be faulty
• Repair or replace damaged wiring or corroded connectors
• Repair open or shorted circuits as identified by electrical testing
• Replace the mirror motor only if confirmed defective
• Reprogram or replace the BCM/door module if module failure is confirmed

Can you drive with code B1683? #

Yes, you can drive with code B1683, but with limitations. While this fault does not affect the engine or critical safety systems, it does compromise your ability to adjust the mirrors for optimal visibility. If your mirrors become stuck in a non-ideal position, blind spots may increase, which is especially hazardous during lane changes or parking. It’s best to address this issue promptly to maintain safe driving conditions.

Vehicles most commonly affected by code B1683 #

While B1683 can appear on many vehicles, it is most frequently reported in models from manufacturers that use standardized body electronics. Ford, GM, and Chrysler have used similar mirror selector switch circuits across multiple platforms, increasing the likelihood of this code in certain segments.

• Ford F-Series (F-150, F-250, etc.)
• Chevrolet Silverado and GMC Sierra
• Ford Fusion and Taurus
• Chrysler 300, Dodge Charger
• Toyota Camry (certain years and trims)
• Some Nissan and Honda models (less common, varies by region)

Common mistakes & best practices for code B1683 #

When tackling B1683, technicians and DIYers sometimes overlook basic steps or misinterpret the issue. Avoiding these pitfalls saves time, money, and frustration.

• Replacing the mirror motor without testing the switch and wiring
• Overlooking corroded connectors in the door harness (often hidden by trim)
• Ignoring related codes that may point to network or module issues
• Not consulting the OEM wiring diagram for circuit layout
• Using non-OEM or low-quality replacement switches, leading to recurring problems

Quick FAQ for code B1683 #

Q: Will clearing the code fix the mirror adjustment issue?
A: No, clearing B1683 without addressing the root cause will only temporarily remove the warning. The fault will return as soon as the system detects the circuit problem again.

Q: Can extreme weather cause mirror switch failures?
A: Yes, exposure to moisture (rain, snow) or temperature extremes can corrode connectors and damage the switch, especially if the door seals are compromised.