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2020 Ford F350
Diagnosis
2020 Ford F350 Mirrors Only Fold in When Raining, Button Issue
February 24, 2026
V
Visitor Original question
My mirrors only fold in when it's raining out. The auto fold feature still works but I can not trigger them to fold or unfold with the button on the door
Wizuto AI Response
Your mirrors folding only automatically in rain but not responding to the door button points to a problem with the manual control circuit or switch rather than the auto fold system itself.
Most likely culprits
- Door mirror fold/unfold button or switch: The button or its wiring is likely faulty or has a poor connection, preventing manual control.
- Mirror control module or BCM (body control module): The module that interprets button commands may have a fault or communication issue.
- Wiring/connectors between door switch and mirror module: Corrosion or damage can cause the button signal to not reach the control module.
How to narrow it down
- Check the door mirror fold button for physical damage or sticking. Press it and listen/feel for a click. No click or mushy feel suggests a bad switch.
- Use a multimeter or test light on the button wiring harness to verify voltage and signal when pressing the button. No signal means switch or wiring fault.
- Inspect door wiring harness and connectors for corrosion, pin damage, or loose connections, especially where the door harness meets the body.
- Scan the vehicle with a Ford-specific scan tool for any body control module or mirror module fault codes that might indicate communication errors.
- Test if the mirrors fold/unfold manually by applying 12V directly to the mirror fold motor (only if you have the skill and tools). If they work, the motor is good and the issue is upstream.
Possible parts (if needed)
- Door mirror fold/unfold switch (only if button fails physical and electrical tests)
- Mirror control module (only if scan tool shows faults or wiring checks out)
- Door wiring harness repair or connector cleaning (only if wiring damage or corrosion found)
A few questions
- Does the mirror fold/unfold button on the door light up or show any sign of activity when pressed?
- Have you noticed any other electrical quirks on the door controls (windows, locks) that might indicate wiring issues?
- Does the auto fold function work perfectly every time it rains, or are there times it fails too?