What Does B1452 Mean?
This code indicates the Body Control Module (BCM) has detected a short to battery voltage in the wiper wash/delay switch circuit. The BCM monitors the switch circuit for proper voltage levels, and has identified an abnormal high voltage condition where battery voltage is present when it should not be. This suggests current is flowing from the battery directly into the switch circuit, bypassing normal control pathways.
Common Causes
40%
Damaged or chafed wiring harness causing wire insulation breakdown and contact with battery voltage source
35%
Faulty multifunction switch or wiper switch with internal short circuit to power
15%
Corroded or damaged connector pins at switch or BCM causing cross-circuit short
10%
Failed Body Control Module with internal circuit fault
Diagnostic Steps
1
Step 1: Perform visual inspection of all wiring from the multifunction switch through the steering column to the BCM, looking for chafed insulation, melted wires, or damage from previous repairs. Pay special attention to areas where harness passes through metal grommets or flex points in the steering column.
2
Step 2: Disconnect the multifunction switch connector and measure voltage on the wiper wash/delay circuit terminal at the vehicle harness side using a digital multimeter. Battery voltage present with switch disconnected confirms wiring harness short; no voltage indicates faulty switch.
3
Step 3: If harness shows battery voltage with switch disconnected, disconnect the BCM connector and repeat voltage measurement. If voltage disappears, problem is between BCM and switch; if voltage remains, trace circuit back toward fuse box to locate short point.
4
Step 4: If no voltage is found at harness with switch disconnected, inspect multifunction switch connectors for corrosion, pushed-back pins, or moisture intrusion. Clean and apply dielectric grease if corrosion present, otherwise replace multifunction switch assembly.
5
Step 5: After repairs, reconnect all components, clear code, and perform operational test of all wiper delay and wash functions. Monitor circuit with multimeter during switch actuation to verify proper voltage transitions and confirm no voltage bleed when switch is in off position.
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to battery voltage in the wiper wash/delay switch circuit. The BCM monitors the switch circuit for proper voltage levels, and has identified an abnormal high voltage condition where battery voltage is present when it should not b...
The most common cause of B1452 (Wiper Wash/Delay Switch Circuit Short To Battery) is: Damaged or chafed wiring harness causing wire insulation breakdown and contact with battery voltage source
Typical repair costs for B1452 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains safe to drive as this affects convenience features only. Wiper and washer functions may be inoperative or operate erratically, which could compromise visibility in inclement weather, so repair should be completed before driving in rain or snow conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1452 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Wiper/Washer System
Difficulty
Type
Manufacturer
Recommended Tools
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