B1244 — Wiper Rear Motor Run Relay Circuit Failure

Introduction:
The diagnostic trouble code B1244 typically indicates an issue with the electrical circuit controlling the rear wiper motor, specifically related to the relay responsible for energizing the motor. In simple terms, this code suggests that the car’s computer (ECU — Engine Control Unit) has detected a malfunction in the relay circuit that powers the rear windshield wiper motor. It’s important to note that label names for this code can vary depending on the vehicle manufacturer.

Fast Facts:

  • System affected: Wiper system (rear)
  • Severity: Moderate
  • Main symptoms: Rear wiper not functioning, possible electrical warning lights
  • Driveability: No (Primarily affects rear wiper operation, not engine or drivetrain)

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Manufacturer variations for trouble code B1244

High-quality vehicle manufacturers often assign their own specific labels or code descriptions to what internally might be similar diagnostic issues. Within the case of B1244, the actual label or description can differ slightly across brands but generally revolves around issues in the rear wiper motor relay circuit.

**Known label variations include:**

  • Ford: B1244 – Rear Wiper Motor Relay Circuit Malfunction
  • Honda: C0A00 – Rear Wiper Relay Circuit Fault
  • Toyota: B1244 – Rear Wiper Relay Circuit Issue
  • Volkswagen: 00996 – Rear Wiper Relay Circuit

It’s essential to refer to the specific manufacturer’s repair manual or diagnostic procedures for precise descriptions, as the diagnostics and repairs may vary slightly.

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What does trouble code B1244 mean?

In simple terms:
This code indicates that the vehicle’s onboard computer has detected a problem with the electrical circuit controlling the relay that powers the **rear wiper motor**. The ECU continually monitors the circuit’s integrity — including voltage levels, wiring, connectors, and the relay’s function. When it detects that the relay circuit is not functioning correctly, it triggers this fault code.

**What the ECU monitors:**
The ECU checks the relay circuit for correct voltage, continuity, and proper switching operation when the rear wiper is activated. If the relay does not energize properly, remains open, or there is a wiring fault, the ECU records the defect.

**What triggers the code:**
The code is typically triggered when the relay controlling the rear wiper motor fails to operate as expected — such as when the motor doesn’t run while the switch is activated, or if there’s a short or open circuit in the wiring.

**Typical context of appearance:**
This code is often logged after a driver attempts to operate the rear wiper, especially after cold weather conditions that may have caused electrical connection issues, or following electrical modifications or repairs.

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Severity and risks of trouble code B1244

This issue is generally considered moderate in severity. It mainly affects the **rear wiper functionality**, and it may not impact the vehicle’s driving performance or safety directly. However, in poor weather conditions, a non-functioning rear wiper can impair visibility, increasing the risk of accidents.

**Potential risks include:**
– Reduced visibility through the rear window during rain or snow
– Possible electrical issues if the circuit fault affects other components
– Further deterioration of the wiper motor or relay if not addressed

**Can the vehicle be driven?**
Yes, the vehicle can be driven, provided the rear wiper is not essential for driving in bad weather. However, it’s advisable to address the fault to restore full vehicle comfort and visibility.

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Symptoms of trouble code B1244

When B1244 is present, the most common symptoms are usually related to **rear wiper malfunction**. Drivers might notice that the rear wiper does not operate when switched on, or that the wiper stops unexpectedly.

**Common symptoms include:**

  • Rear wiper remains stationary even when activated via switch
  • Electrical warning or warning light related to wiper system appearing
  • Inconsistent or flickering rear wiper operation
  • No noise or movement from the rear wiper motor when commanded to run
  • Possible relay or fuse-related electrical issues paired with other circuit fault indicators

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Most likely causes of trouble code B1244

This fault can stem from several electrical or component-related issues, and proper diagnosis is essential to determine the root cause.

**Introduction:**
The causes are often related to relay control issues, wiring problems, or the wiper motor itself. The following is a ranked list of the most common causes, from most to least frequent.

  1. Faulty Rear Wiper Motor Relay: The relay is the component responsible for switching power to the motor. A failure or contamination in this relay often causes the circuit fault.
  2. Wiring or Connection Issues: Corrosion, damaged wiring, or poor connections between the relay, wiring harness, or connector pins can interrupt the circuit.
  3. Burnt or Blown Fuse: An overload or short circuit may blow the fuse associated with the rear wiper system, leading to loss of proper circuit function.
  4. Damaged or Failing Rear Wiper Motor: If the motor itself has internal faults, it can draw excessive current or fail to operate, triggering a circuit fault code.
  5. Control Module or ECU Malfunction: Rarely, the vehicle’s control modules may misinterpret signals or experience internal faults affecting the relay circuit.

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How to diagnose trouble code B1244

Proper diagnosis begins with understanding that electrical issues often require systematic checks to identify the faulty component.

**Intro:**
The following are generic troubleshooting steps, which can be performed without manufacturer-specific tools but should be conducted carefully, especially when dealing with electrical circuits.

  1. Visual Inspection: Check the fuse related to the rear wiper circuit. Inspect wiring harnesses, relay sockets, and connectors for corrosion, damage, or loose connections.
  2. Test the Fuse: Remove and inspect the fuse. Replace if blown and observe if the code clears or reappears.
  3. Relay Check: Swap the relay with a similar known-good relay, if available, to test for function. Or test the relay coil and contacts with a multimeter or relay tester.
  4. Live Data and Activation: Use an OBD-II scanner capable of reading live data to verify if the relay is being commanded correctly when activating the rear wiper switch.
  5. Wiring Continuity: With the circuit de-energized, perform a continuity test on wiring between the relay, switch, and motor connection points to identify open circuits or shorts.
  6. Motor Testing: Directly supply power to the rear wiper motor using a 12V power source to confirm if the motor responds correctly or is internally damaged.

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Possible repairs for trouble code B1244

The appropriate repair depends on the root cause identified during diagnosis. Addressing issues promptly can prevent further electrical damage.

**Possible repairs and their complexity:**
– Replace the relay: This is a basic repair that can be performed by a DIY enthusiast with basic knowledge of vehicle electrical systems. It involves removing the faulty relay and installing a new one matching the manufacturer’s specifications.
– Repair or replace damaged wiring or connectors: This repair requires locating broken, corroded, or burnt wires and performing solder or crimp repairs. Usually performed by professionals or experienced DIYers.
– Replace the fuse: A simple, often inexpensive fix if the fuse is blown. Remember to investigate the reason for the fuse blowing before replacing to avoid recurrent issues.
– Replace the rear wiper motor: When the motor is seen to be internally faulty, replacement is necessary. This is a more complex repair, typically done by a professional.
– Control module repair or replacement: Rare and more costly. Usually carried out by specialists and only after confirming internal control module faults.

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Vehicles commonly associated with trouble code B1244 in Europe

This code can potentially affect various makes and models, particularly those with rear wiper systems that depend on relays — often in family-oriented vehicles or SUVs.

**Summary:**
In European markets, B1244 has been reported mainly in models from brands such as Volkswagen, Audi, and some Ford vehicles, especially those manufactured after 2010. The exact prevalence varies depending on regional electrical standards and model specifics.

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Frequent mistakes with trouble code B1244

Proper troubleshooting and repairs require care and attention to detail. Common mistakes can lead to misdiagnosis or further electrical issues.

**Common mistakes include:**
– Replacing parts without verifying the actual fault (e.g., swapping relays without testing)
– Overlooking wiring issues or corrosion in connectors
– Ignoring fuse conditions or persistent wiring damage
– Using incorrect replacement relays that do not match specifications
– Neglecting to clear the code after repairs, leading to confusion about whether the problem is resolved

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FAQ — trouble code B1244

**Q: Can this code disappear on its own?**
A: It is unlikely; unless the fault was transient (such as a temporary short). Typically, the code persists until repairs are made and the system is reset.

**Q: Can I keep driving?**
A: Yes, but only if the rear wiper is not needed frequently. The primary concern is reduced visibility through the rear window during rain or snow, which could compromise safety.

**Q: Why does the code return after clearing it?**
A: Because the underlying cause — such as a faulty relay, wiring problem, or motor issue — has not been fixed. The ECU detects the fault again once the condition persists.

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Maintaining the rear wiper system’s electrical health is crucial not just for comfort but also for safety. Proper diagnosis and timely repairs help ensure your vehicle remains reliable and safe in all weather conditions.

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