What Does B1457 Mean?
This code indicates the Body Control Module (BCM) has detected a short to ground in the circuit that controls the windshield washer fluid low level warning lamp on the instrument cluster. The BCM monitors this circuit and sets this code when it detects abnormally low voltage or resistance, indicating the control wire is touching ground somewhere between the BCM and the dashboard indicator light. This prevents the warning lamp from functioning properly to alert the driver of low washer fluid.
Common Causes
45%
Damaged or chafed wiring harness creating a short to ground between BCM and instrument cluster
30%
Failed instrument cluster with internal short circuit in the washer fluid lamp driver circuit
15%
Corroded or water-damaged connector pins at BCM or instrument cluster causing ground fault
10%
Faulty Body Control Module with internal short in lamp control driver circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the instrument cluster wiring harness and connectors for obvious damage, chafing against metal, pinch points, or corrosion. Pay special attention to areas where harnesses pass through firewalls or near moving components.
2
Step 2: Disconnect the instrument cluster connector and use a digital multimeter to measure resistance between the washer fluid lamp control wire (consult wiring diagram for specific pin) and known good chassis ground. Reading should be greater than 10K ohms; lower resistance confirms short to ground in harness or cluster.
3
Step 3: If high resistance is found at cluster connector, reconnect cluster and disconnect BCM connector. Measure resistance from BCM washer lamp output pin to ground. Low resistance with cluster disconnected indicates wiring harness short; high resistance indicates faulty instrument cluster.
4
Step 4: Isolate the short location by disconnecting intermediate connectors along the harness route while monitoring resistance. Identify the harness section where resistance changes from low to high to pinpoint damaged section.
5
Step 5: Repair or replace damaged wiring/connectors as identified. If no wiring fault found and cluster tests faulty, replace instrument cluster. Clear codes and verify washer lamp operates correctly with BCM commanding lamp on/off.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to ground in the circuit that controls the windshield washer fluid low level warning lamp on the instrument cluster. The BCM monitors this circuit and sets this code when it detects abnormally low voltage or resistance, indicatin...
The most common cause of B1457 (Wiper Washer Fluid Lamp Circuit Short To Ground) is: Damaged or chafed wiring harness creating a short to ground between BCM and instrument cluster
Typical repair costs for B1457 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects the washer fluid warning light and does not impact vehicle operation or critical safety systems. Repair at convenience, but note you will not receive visual warning when washer fluid is low.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1457 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System / Instrument Panel Warning Lamps
Difficulty
Type
Manufacturer
Recommended Tools
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