B1452
Wiper Wash/Delay Switch Circuit Short To Battery
Body Chassis/Safety Wiper Control 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The wiper wash/delay switch circuit is shorted directly to battery power, meaning it's receiving too much voltage. Think of it like a light switch that's stuck in the "on" position because someone bypassed the circuit.

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Symptoms You May Notice
3 known symptoms for this code
Wiper washer spray activates unintentionally or continuously
Wiper delay function not working or stuck at one setting
Warning light or message on dashboard for wiper system
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the voltage signal from the wiper wash/delay switch circuit, expecting values between ground and a reference voltage. When the circuit shorts to battery (12V), the ECU detects abnormally high voltage that exceeds the normal operating threshold, triggering the fault code.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Switch Circuit Voltage 0-5V variable signal Above 10V (shorted to battery)
Circuit Resistance Variable 1-100K ohms Below 1 ohm (direct short)
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiper wash/delay switch
Locate switch on turn signal lever and replace if internally shorted or stuck.
2
Wiring harness connector
Inspect connector pins for corrosion or damage causing a short; clean or replace connector.
3
Wiper control module/relay
Test and replace the control module if wiring checks out and switch is functional.