B1458

Code

Other B — Body

Wiper Washer Pump Motor Relay Circuit Failure

Brand: Other

Type: B — Body

Views: UK: 21 EN: 32 RU: 24

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Page language: EN

Causes

Blown fuse for washer pump or related circuits
Faulty washer pump relay
Open or shorted wiring between relay, pump and module
Corroded or loose connector(s) at relay, pump or ground
Failed washer pump motor
Faulty Body Control Module (BCM) or relay driver output

Symptoms

Washer fluid pump does not operate when switch is pressed
Intermittent operation of washer pump
Washer pump runs continuously or unexpectedly
Related fuse blows repeatedly
Washer warning or body system messages on dash

What to check

Perform visual inspection of fuse, relay, washer pump, connectors and wiring for damage or corrosion
Check for related fuse continuity and correct fuse rating
Verify operation of washer switch and associated inputs using a scan tool or diagnostic terminal
Listen/observe for relay clicking when washer is commanded
Measure voltage at washer pump connector while activating system
Check ground integrity at pump and relay mounts

Signal parameters

Relay control voltage from BCM: typically 0 V (ground-switch) or +12 V when energized
Supply voltage to pump at connector: ~12 V when commanded
Coil resistance of relay: manufacturer spec (typically tens to hundreds of ohms)
Pump motor resistance: low ohms (varies by vehicle); expected current draw under normal load (amps)
Continuity/resistance of wiring between BCM, relay, and pump (< few ohms expected for short runs)
Open-circuit or short-to-power/ground indications on wiring checks

Diagnostic algorithm

Verify symptom: attempt washer pump operation and note behavior. If fuse blows, do not continue until cause located.
Visual inspection: check fuses, relay, pump, connectors and wiring for damage, corrosion or water ingress. Repair obvious issues.
Check fuse: verify continuity and correct rating. Replace if blown and retest briefly to see if fault recurs.
Check relay operation: with ignition on, command washer and listen for relay click. If no click, probe relay coil terminals for control signal from BCM (0 V vs 12 V).
Apply 12 V directly to pump ground or positive (follow vehicle polarity) to verify pump runs. If pump does not run, replace pump.
Measure voltage at pump connector while washer commanded. If no voltage present but relay clicks, check continuity between relay output and pump. Repair wiring/connector faults.
If pump draws excessive current when directly powered, replace pump. If wiring short to ground/power is suspected, isolate sections and find short.
If relay does not receive control signal, test continuity and voltage of control circuit to BCM; check BCM grounds and power. If control output stuck or incorrect, consider BCM fault after wiring proven good.
Replace suspect components (relay, pump, damaged wiring/connector), clear codes, and perform functional test of washer system. Re-scan for stored/return codes.
If problem persists after harness and component replacement, consult vehicle-specific wiring diagrams and consider BCM replacement or reprogramming as last step.

Likely causes

Corroded connector at washer pump or relay
Relay coil or contacts failed
Damaged wiring harness near washer pump or in door/hood area
Bad ground at washer pump or relay mounting point
Washer pump seized or drawing excessive current causing circuit fault

Fault status

⚠️ Status

Body code B1458 — Washer pump motor relay circuit fault detected. Indicates open, short, or abnormal control/feedback on the washer pump relay circuit; may disable or impair washer pump operation.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours