What Does B1447 Mean?
This code indicates the Body Control Module (BCM) has detected an open circuit in the wiper park sense circuit. The park sense system monitors when the wiper blades return to their rest position after being turned off. An open circuit means there is a break in the electrical pathway preventing the BCM from receiving the park position signal from the wiper motor assembly.
Common Causes
35%
Broken or disconnected wiring between BCM and wiper motor park sense terminal
30%
Failed wiper motor park sense switch internal to motor assembly
20%
Corroded or loose connector terminals at wiper motor or BCM
10%
Damaged BCM with failed park sense input circuit
5%
Blown fuse or open circuit in power supply to park sense circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of wiper motor connector and BCM connector for corrosion, damage, or loose/backed-out terminals. Check all fuses related to wiper system and BCM power supply.
2
Step 2: Using a digital multimeter, backprobe the park sense wire at the wiper motor connector with wipers in park position. Check for proper voltage reference (typically 5V or 12V depending on manufacturer) from BCM.
3
Step 3: Manually cycle wipers on and off while monitoring park sense signal wire with multimeter or oscilloscope. Signal should change state when wipers reach park position. If no change occurs, suspect internal wiper motor park switch failure.
4
Step 4: Perform continuity test on park sense wire from wiper motor connector to BCM connector with both ends disconnected. Resistance should be less than 5 ohms. If open circuit found, locate and repair wiring break.
5
Step 5: If wiring and connectors test good, test wiper motor park switch independently by applying power directly to motor and monitoring park sense output. If no output signal, replace wiper motor assembly.
6
Step 6: Clear code, cycle wipers through multiple operations, and verify park sense signal is received by BCM using scan tool live data. Confirm DTC does not return.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected an open circuit in the wiper park sense circuit. The park sense system monitors when the wiper blades return to their rest position after being turned off. An open circuit means there is a break in the electrical pathway preventing the B...
The most common cause of B1447 (Wiper Park Sense Circuit Open) is: Broken or disconnected wiring between BCM and wiper motor park sense terminal
Typical repair costs for B1447 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive. Wipers may not park properly in the correct rest position or may stop mid-sweep when turned off, which can obstruct driver visibility. Repair at earliest convenience to maintain proper wiper operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1447 to identify the root cause.
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Quick Info
Category
Body
System
Wiper/Washer System
Difficulty
Type
Manufacturer
Recommended Tools
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