B1465
Wiper Brake/Run Relay Circuit Open
Body Chassis/Safety Wiper Control Circuit 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The wiper relay circuit has an open connection, meaning electricity can't flow properly to control the wipers. It's like a broken light switch that prevents the circuit from completing.

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Symptoms You May Notice
3 known symptoms for this code
Windshield wipers do not operate on any speed setting
Wiper relay clicks but wipers don't move
Intermittent wiper function or complete failure
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors voltage and current flow through the wiper relay circuit when the wiper switch is activated. It detects an open circuit condition when expected current draw drops to zero or remains below minimum threshold despite relay command activation.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Relay Circuit Current 2-8 amps during wiper operation Less than 0.5 amps or no current flow
Relay Control Voltage 12-14V when activated 0V or insufficient voltage at relay coil
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiper relay
Locate the relay in the fuse/relay box under the dashboard or engine bay and swap it with an identical relay from another circuit to test; replace if faulty.
2
Wiring harness and connectors
Inspect the wiper relay connector and wiring for corrosion, loose pins, or broken wires; reseat connectors firmly or repair damaged wire insulation.
3
Wiper switch assembly
Test continuity through the wiper stalk switch with a multimeter; replace the switch if it shows no continuity in any position.