B1244 — Wiper Rear Motor Run Relay Circuit Failure #

Note: The code description may vary depending on the vehicle manufacturer (OEM). Below are some known naming variations for B1244:

• B1244 – Rear Wiper Motor Relay Circuit Malfunction (Ford, Lincoln, Mercury)
• B1244 – Rear Wiper Relay Circuit Failure (Toyota, Lexus)
• B1244 – Rear Window Wiper Motor Run Relay Circuit Error (Nissan)

Summary of DTC B1244 #

B1244 is an OBD-II body code signaling an electrical fault in the rear wiper motor run relay circuit. This means the vehicle’s onboard computer (often called the Body Control Module, or BCM) has detected an open, short, or abnormal voltage within the wiring or relay responsible for powering the rear window wiper motor. The rear wiper relay acts as an electronic switch, allowing the BCM to safely control wiper motor operation without directly handling high current. If this circuit does not perform as expected, rear wiper function may be compromised. While this is not a critical safety issue, it can affect visibility in adverse weather and may be symptomatic of broader electrical issues.

Common Symptoms for B1244 #

If your vehicle’s system has logged code B1244, you’re likely to notice one or more of the following symptoms. These issues can range from subtle inconveniences to more obvious operational failures, especially if weather conditions demand rear visibility:

• Rear wiper does not operate at all
• Rear wiper operates intermittently or erratically
• Rear wiper stuck in one position (won’t return to “park”)
• Unusual clicking noises from the rear hatch area when activating the wiper
• Illuminated warning light or message on the instrument cluster

Probable Causes for DTC B1244 (Most to Least Likely) #

The origins of a B1244 code are most often rooted in electrical issues, but could also involve mechanical or module-related failures. Here are the most common causes, ordered by frequency seen in the field:

1. Faulty rear wiper relay (contacts worn, stuck, or corroded)
2. Wiring problems (open circuit, short to ground, short to power, corroded connectors)
3. Failed rear wiper motor (drawing excessive current, internal short)
4. Faulty Body Control Module (BCM) (rare, but possible if relay and wiring test good)
5. Blown fuse (protecting the relay or circuit)
6. Poor ground connection at the rear hatch or relay socket

Step-by-Step Diagnostic Approach for B1244 #

Diagnosing a B1244 code requires a systematic approach to avoid unnecessary parts replacement and to ensure you pinpoint the exact cause. Here’s a proven step-by-step method:

• Verify the code and clear it. Use a scan tool to confirm B1244 is active, then clear it and see if it returns after operating the rear wiper.
• Inspect the fuse. Check the fuse associated with the rear wiper relay for continuity and correct amperage.
• Test relay function. Swap in a known good relay (if available) or test the relay’s coil and contacts using a multimeter.
• Check for power and ground at the relay socket. With the wiper switch ON, use a test light or meter to verify voltage and ground at the relay socket.
• Inspect wiring and connectors. Visually inspect for corrosion, damage, or loose pins at the relay, motor, and BCM connectors.
• Test rear wiper motor operation. Apply direct battery voltage (via fused jumper) to the motor to confirm it runs smoothly.
• Check control signals from the BCM. Use a scan tool or voltmeter to see if the BCM is properly signaling the relay when commanded.
• If all above passes, consider BCM as possible culprit. Confirm with OEM-specific diagnostic flowcharts before replacement.

Possible Repairs for B1244 #

The correct repair for a B1244 code depends on the root cause identified during diagnosis. Here’s how typical causes translate into repairs:

• Replace faulty rear wiper relay if it fails continuity or function tests.
• Repair or replace damaged wiring/connectors (fix opens, shorts, corroded terminals, or broken wires).
• Replace the rear wiper motor if it is internally shorted or non-functional.
• Replace blown fuse with one of the correct rating, and investigate the cause for the blown fuse.
• Clean and secure all ground connections in the rear hatch/wiper circuit.
• Replace the Body Control Module (BCM) only after all other components have tested good and per OEM guidance.

Is It Safe to Drive With Code B1244? #

Limited – Exercise Caution. While a B1244 code does not directly impact engine or brake safety, it can affect rearward visibility during rain, snow, or dusty conditions. If you live in an area with frequent adverse weather, it’s advisable to address the issue promptly to maintain safe driving conditions. For most drivers, normal city or highway operation is possible, but caution should be used if rear window visibility becomes obstructed.

Vehicles Most Commonly Affected by B1244 #

Based on field experience and OEM documentation, B1244 is most often encountered on vehicles with rear wiper systems, especially certain models from the following brands:

• Ford (Escape, Explorer, Edge, Flex)
• Lincoln (MKX, Navigator)
• Toyota (RAV4, Highlander, Sienna)
• Lexus (RX, GX)
• Nissan (Rogue, Pathfinder, Murano)
• Mercury (Mariner, Mountaineer)

Other makes and models with rear wipers may also set this code, but these are the most frequently reported.

Common Mistakes & Best Practices for B1244 #

When troubleshooting and repairing a B1244 code, professionals and DIYers alike can fall into some avoidable traps. Here are the most common errors—and the best habits to adopt:

• Replacing the relay without testing it first. Always verify relay function before swapping parts.
• Overlooking corroded connectors in the rear hatch area—common in humid or snowy climates.
• Neglecting to check the fuse or to look for underlying causes of a blown fuse.
• Assuming the wiper motor is faulty before confirming power and ground supply at the motor connector.
• Ignoring ground connections. Poor grounds are a frequent culprit in rear hatch circuits.
• Not clearing codes after repair and confirming the fix with a test drive.

Quick FAQ for B1244 #

Got more questions about B1244? Here are fast answers to the most common concerns:

• Q: Can a B1244 code be caused by a dead battery?
  A: Unlikely. While low voltage can sometimes trigger network errors, B1244 specifically points to a fault in the rear wiper relay circuit. Always check battery health as part of good maintenance, but focus on the relay and wiring for this code.
• Q: Will a B1244 code clear itself?
  A: Not usually. The code will persist until the underlying fault is repaired and the code is cleared with a scan tool, or until the system no longer detects a fault for a set number of drive cycles.

If you have additional questions, consult your vehicle’s service manual or contact a certified technician for tailored advice.