Code
B1244
ALFA ROMEO
B — Body
Rear wiper relay circuit
AI status
Completed
Completed
100%
Causes
- Failed or sticking rear wiper relay
- Blown fuse protecting the rear wiper circuit
- Open, shorted or high resistance wiring between relay, wiper motor, switch and BCM
- Corroded or loose connector or terminal at relay, motor or fuse box
- Poor ground at wiper motor or relay ground point
- Seized or mechanically obstructed rear wiper motor
Symptoms
- Rear wiper inoperative (no movement)
- Intermittent rear wiper operation
- Rear wiper stuck in ON or OFF position
- No audible relay click when rear wiper activated
- Blown fuse after attempting to operate rear wiper
- Other body electrical anomalies if BCM output affected
What to check
- Read stored DTCs and freeze frame data with a diagnostic scanner; note any related body module codes
- Visual inspection of rear wiper relay, fuses and fuse box for damage or corrosion
- Inspect wiring harness and connectors for damage, corrosion, pin push-out or water ingress
- Check ground(s) for continuity and signs of corrosion; clean and secure grounding points
- Operate rear wiper switch while listening for relay click and observing fuse behavior
- Swap relay with identical known-good relay (if available) to check function
Signal parameters
- Supply voltage at relay supply terminal: ~12 V with ignition ON (11–14 V typical)
- Control signal from BCM/switch to relay coil: near 0 V (ground) when activated or near battery voltage when deactivated depending on circuit type; expect a distinct change when switch is operated
- Relay coil resistance (typical small automotive relay): ~50–200 Ω (varies by relay)
- Wiper motor current draw while running: typically 1–8 A (measure with ammeter); large spikes at start ok but excessive continuous current suggests mechanical/seized motor or short
Diagnostic algorithm
- Connect a diagnostic scanner; record DTCs and related modules. Clear codes and attempt to reproduce B1244.
- Visually inspect fuse(s) and relay(s) for the rear wiper. Replace any blown fuse and note if it blows again on test.
- Swap the rear wiper relay with a known-good identical relay and re-test to see if fault follows the relay.
- With ignition ON, measure battery voltage at the relay power terminal. Confirm fused supply is present and stable.
- Operate the rear wiper switch while probing the relay coil/control terminal. Verify the controller sends the expected signal (voltage change or ground) to energize the coil.
- Check continuity between relay output and rear wiper motor positive terminal. Check continuity to ground from the motor body/ground terminal.
- Bench-test the rear wiper motor by applying fused 12 V directly to its power/ground to confirm operation and measure running current. Inspect for mechanical binding.
- Inspect and clean connectors at the motor, relay, and BCM. Repair corroded pins or damaged wiring; perform solder/heat-shrink or OEM repair techniques as required.
- If wiring and components test OK, check BCM outputs and input signals with a scope or scan tool; consider BCM software updates or replacement if controller outputs are faulty.
- After repair, clear codes and road-test; re-scan to confirm B1244 does not return.
Likely causes
- Faulty rear wiper relay
- Blown fuse for rear wiper circuit
- Open or short in wiring to relay or wiper motor
- Poor ground connection at motor or relay
- Corroded connector at relay or motor
Fault status
Status
Rear wiper relay circuit fault detected. Possible relay, fuse, wiring, connector or BCM output issue. Inspect relay/fuse, wiring and grounds; test motor operation and correct any damaged components before clearing code.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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