Passenger Mirror Vertical Switch Short to Battery
Diagnostic trouble code B1743 indicates a short to battery voltage in the passenger side mirror vertical switch circuit. This means the circuit controlling the up/down movement of the passenger mirror is seeing abnormally high voltage, typically due to a short in the wiring or a faulty switch. This code is manufacturer-specific and follows SAE J2012 diagnostics.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty passenger mirror switch
- Short circuit in the vertical switch wiring
- Corroded or poor electrical connection
- Failed mirror control module
3. Symptoms You Will Notice
- Passenger mirror does not move vertically
- Mirror moves erratically or only in one direction
4. Step-by-Step Diagnosis
Check for blown fuses related to the mirror circuit
Inspect the passenger mirror switch and wiring for damage or corrosion
Test voltage at the mirror motor connector with the switch operated
If wiring and switch are good, test the mirror control module
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is safe to drive. The fault only affects the passenger mirror vertical adjustment, which is not critical for vehicle operation.
How much does it cost to fix?▼
Repair costs typically range from $100 to $300, depending on whether the switch, wiring, or module needs replacement.