What Does B1615 Mean?
This code indicates the Body Control Module (BCM) has detected a malfunction in the rear wiper disable switch circuit. The BCM monitors this switch to allow the driver to turn off the rear wiper function, and has identified either an open circuit, short circuit, or abnormal voltage in the switch or its wiring. This is a manufacturer-specific body system code that affects rear wiper operation control.
Common Causes
45%
Faulty rear wiper disable switch with internal open or short circuit
30%
Damaged or corroded wiring between BCM and rear wiper disable switch
15%
Poor electrical connection or corroded terminals at switch connector
10%
Body Control Module internal circuit failure
Diagnostic Steps
1
Step 1: Visually inspect the rear wiper disable switch and its connector for physical damage, corrosion, pushed-out pins, or moisture intrusion. Check connector for proper seating and terminal integrity.
2
Step 2: Using a digital multimeter, test voltage at the switch connector with ignition on. Verify reference voltage (typically 5V or 12V) is present on the supply wire per manufacturer specifications.
3
Step 3: Test the switch itself by measuring resistance across switch terminals in both positions (enabled/disabled). Compare readings to specifications, typically showing continuity in one position and open circuit in the other.
4
Step 4: Perform continuity test on wiring harness between BCM connector and switch connector with both disconnected. Check for opens, shorts to ground, and shorts to power on all circuit wires.
5
Step 5: If all wiring and switch test normal, suspect BCM internal fault. Verify BCM ground connections are clean and secure, then consider BCM replacement or reprogramming if available as a repair option.
6
Step 6: After repair, clear codes and cycle the rear wiper disable switch multiple times while monitoring live data to confirm proper signal reception at BCM and verify code 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 a malfunction in the rear wiper disable switch circuit. The BCM monitors this switch to allow the driver to turn off the rear wiper function, and has identified either an open circuit, short circuit, or abnormal voltage in the switch or ...
The most common cause of B1615 (Wiper Rear Disable Switch Circuit Failure) is: Faulty rear wiper disable switch with internal open or short circuit
Typical repair costs for B1615 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving. This code only affects the ability to disable the rear wiper function and does not impact vehicle safety or critical driving systems. Repair at convenience, though rear wiper functionality may be compromised in inclement weather.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1615 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System / Rear Wiper System
Difficulty
Type
Manufacturer
Recommended Tools
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