B1320 Mercury Code - Driver Door Ajar Circuit Open
Quick Answer
The Smart Junction Box (SJB) sends a voltage signal to the door ajar switches. Common causes include Faulty Driver Door Ajar Switch, Driver Door Ajar Switch harness is open or shorted, Driver Door Ajar Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B1320 Mercury indicates Driver Door Ajar Circuit Open.
- Common causes
- Common causes include Faulty Driver Door Ajar Switch, Driver Door Ajar Switch harness is open or shorted, Driver Door Ajar Switch circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B1320 Mercury Description
What are the Possible Causes of the DTC B1320 Mercury?
- Faulty Driver Door Ajar Switch
- Driver Door Ajar Switch harness is open or shorted
- Driver Door Ajar Switch circuit poor electrical connection
- Faulty Smart Junction Box (SJB)
How to Fix the DTC B1320 Mercury?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1320 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B1320 Mercury Code
1. What does the OBDII code B1320 mean for a Mercury vehicle?
The B1320 code indicates that there is an open circuit in the driver door ajar switch or its associated wiring.
2. What are the common symptoms of the B1320 code?
Symptoms include the door ajar warning staying on, interior lights not turning off, and potential issues with the power locks or alarm system.
3. What causes the B1320 code to appear?
Common causes include a faulty driver door ajar switch, damaged or corroded wiring, or a loose connection in the circuit.
4. How can I diagnose the B1320 code?
Start by visually inspecting the wiring and connectors around the door ajar switch. Use a multimeter to test for continuity in the circuit and ensure the switch is functioning properly.
5. Can the driver door ajar switch be repaired, or does it need replacement?
In most cases, the switch will need to be replaced if it is faulty, but damaged wiring or loose connections can often be repaired.
6. Is it safe to drive with the B1320 code?
Yes, but it can lead to battery drain if the interior lights stay on or other electrical systems malfunction due to the open circuit.
7. How much does it cost to fix the B1320 code?
The repair cost can range from $50 to $150 for parts and labor, depending on whether the issue is the switch or wiring.
8. Can a B1320 code cause my battery to die?
Yes, if the door ajar warning keeps the interior lights on, it can drain the battery over time.
9. Will clearing the B1320 code with a scanner fix the problem?
Clearing the code may temporarily turn off the warning, but the underlying issue must be repaired to prevent the code from returning.
10. Can I fix the B1320 code myself?
If you're comfortable working with wiring and basic tools, you can inspect and replace the door ajar switch or repair damaged wiring yourself.
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