B1465

Code

Other B — Body

Wiper Brake/Run Relay Circuit Open

Brand: Other

Type: B — Body

Views: UK: 24 EN: 38 RU: 25

AI status

Completed

ready

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Page language: EN

Causes

Blown fuse for wiper circuit
Faulty or missing wiper brake/run relay
Open or damaged wiring between relay and wiper motor or control module
Corroded or loose relay/socket/ground/connector
Failed wiper motor park switch or internal wiring
Faulty body control module (BCM) or relay driver output

Symptoms

Wipers do not operate when switch commanded
Wipers operate only intermittently or only in one mode (run or park)
Wipers fail to return to park position after turn off
No relay click heard when wiper switch is operated
DTC B1465 stored and possibly related wiper DTCs present

What to check

Inspect wiper fuse(s) and replace if blown
Visually inspect wiper relay and relay socket for corrosion, overheating or loose terminals
Listen for relay click when switch is operated
Check for battery voltage at relay supply terminal with ignition ON
Verify ground integrity at relay and wiper motor grounds
Scan for additional related body or powertrain codes and wiper status data

Signal parameters

Battery supply voltage present at relay supply terminal with ignition ON (~12 V)
Relay coil activation: control side should see ~12 V or ground (depending on design) when wiper switch/BCM commands ON
Coil resistance (relay dependent): typical 50–200 ohms (consult service data for exact value)
Continuity between relay output terminal and wiper motor run/park input when measured with harness disconnected (should not be open)
Good chassis ground at motor and relay (near 0 Ω to battery negative)

Diagnostic algorithm

Safety: park vehicle, key OFF, disconnect battery if required by vehicle procedure before connector work.
Check fuses: verify all wiper-related fuses and fusible links are intact. Replace if blown and retest.
Inspect relay: remove wiper brake/run relay, inspect socket and relay pins for corrosion or damage. Swap with a known good relay of same type if available and retest.
Verify supply & ground: with ignition ON, measure battery voltage at relay supply pin. Verify good ground at relay ground pin and wiper motor ground.
Activate circuit and backprobe: backprobe relay control/coil terminal while commanding wipers ON. Confirm control signal (12 V or ground) appears when switch is commanded. If control signal missing, trace back to BCM/switch.
Check continuity: with battery disconnected, measure continuity from relay output pin to wiper motor input (run/park). Repair any open circuits, broken wires, or connectors.
Inspect wiper motor: if wiring and relay are confirmed good but the circuit still reads open, check the wiper motor park switch and internal motor connections; replace motor if internal switch is open.
Repair and retest: repair/replace failed components (relay, wiring, connector, fuse, motor). Clear codes, perform functional test of wipers through full range and ensure park returns correctly. Re-scan for recurrence.
If fault persists after wiring and component repair, test BCM/relay-driver output per manufacturer procedures or consult module diagnostics; replace module only after confirming driver failure.