B1476 — Wiper High Speed Circuit Motor Failure #

Note: The code description may vary depending on the vehicle manufacturer.

• Wiper High Speed Circuit Malfunction (Ford, Lincoln, Mercury)
• Windshield Wiper Motor High-Speed Circuit Failure (Chrysler, Dodge, Jeep)
• Front Wiper High Speed Circuit Fault (GM/Chevrolet, Opel/Vauxhall)

Summary of the B1476 Code #

The B1476 – Wiper High Speed Circuit Motor Failure code indicates a detected issue within the electrical circuit that controls the high-speed function of your vehicle’s windshield wipers. The Body Control Module (BCM – the car’s “central nervous system” for body electronics) monitors the wiper motor circuits and signals an error if the high-speed circuit is not responding as expected. This can mean the wiper motor isn’t spinning fast enough, isn’t working at all on high speed, or the circuit has become open or shorted. Most often, this fault is triggered by an electrical problem such as a broken wire, a faulty relay, or a worn-out wiper motor. Occasionally, it may also be due to a malfunction in the BCM or a poor connection at harness connectors.

Common Symptoms for Code B1476 #

Vehicles with a B1476 code usually present clear signs during wiper operation. If you’ve noticed your wipers refusing to switch to high speed, or if they only operate slowly regardless of your command, this code could very well be the culprit. Sometimes, the wipers may not function at all, or may stop mid-sweep, especially when switching between speeds. In rare cases, you might notice erratic or jerky wiper movement. Here are the most common symptoms:

• Wipers do not operate at high speed
• Wipers work only in low or intermittent speeds
• No response when the high-speed setting is selected
• Wipers stop unexpectedly or mid-sweep
• Unusual noises or jerky movement from wiper motor
• Possible warning light or message on the dashboard

Likely Causes for Code B1476 #

The B1476 code is typically rooted in electrical or mechanical issues related to the wiper system’s high-speed operation. Most often, the fault is caused by a failed wiper motor, but other components in the high-speed circuit can also be at fault. Here’s a prioritized list of probable causes, starting from most frequent:

1. Defective wiper motor (especially the high-speed winding or internal relay)
2. Faulty wiper motor relay (responsible for switching to high speed)
3. Open, corroded, or damaged wiring in the high-speed circuit
4. Loose or corroded connector at the wiper motor or relay
5. Faulty Body Control Module (BCM) (rare, but possible)

Step-by-Step Diagnosis for B1476 #

Diagnosing the B1476 code requires a logical approach, starting with the most accessible components and moving toward less common causes. Here’s a methodical process for pinpointing the problem:

1. Verify the code with a scan tool and note any related codes.
2. Test the wiper operation in all speed settings; confirm if only high speed is affected.
3. Inspect the wiper motor wiring and connectors for signs of corrosion, looseness, or damage.
4. Check the wiper motor relay (swap with a similar one if possible and retest).
5. Measure voltage at the wiper motor high-speed terminal when the switch is set to high – no voltage suggests a wiring or relay issue; correct voltage but no motor function points to a faulty motor.
6. Test the wiper motor directly with 12V power (bench test) to confirm its operation.
7. If all tests above are normal, consider the BCM as a potential source, but only after ruling out all wiring and hardware faults.

Possible Repairs for Code B1476 #

Once you’ve identified the root cause of the B1476 code, the appropriate repair should be clear. The majority of cases are resolved by replacing either the motor or a relay, but sometimes a simple wiring fix is all that’s needed. Here are the main repair actions:

• Replace the faulty wiper motor
• Replace the defective high-speed relay
• Repair or replace damaged wiring or corroded connectors in the high-speed circuit
• Clean and secure all connectors at the wiper motor and relay
• In rare instances, replace the Body Control Module (requires OEM programming)

Is It Safe to Drive With Code B1476? #

Driving with a B1476 code is not recommended during adverse weather conditions. While your low-speed or intermittent wiper setting may still function, the inability to use high-speed wipers could severely limit visibility in heavy rain or snow, posing a safety hazard. If you live in an area with frequent inclement weather, it’s best to address this issue before driving further. If high-speed wipers are not essential due to local climate, you may be able to use the vehicle for short trips with caution, but repair should not be delayed.

Vehicles Most Commonly Affected by B1476 #

This code is most frequently reported on vehicles where the high-speed wiper circuit is controlled by a dedicated relay and monitored by a sophisticated BCM. The following models are often linked with B1476:

• Ford F-Series (F-150, F-250, etc.)
• Ford Explorer and Escape
• Chrysler Town & Country, Dodge Grand Caravan
• Chevrolet Silverado, GMC Sierra
• Jeep Grand Cherokee
• Lincoln Navigator and Aviator

Common Mistakes & Best Practices for B1476 #

When troubleshooting the B1476 code, certain pitfalls can lead to wasted time or unnecessary part replacements. Here’s how to avoid the most frequent errors:

• Replacing the wiper motor without first verifying power and ground supply at the high-speed terminal
• Overlooking corroded or loose connectors, especially in areas prone to water intrusion
• Neglecting to check the relay or swapping in a known-good one as a quick diagnostic step
• Assuming the BCM is faulty before confirming all wiring and hardware are in good condition
• Ignoring intermittent operation, which often points to connection issues rather than component failure

Express FAQ for Code B1476 #

Q: Can B1476 cause other electrical problems in my vehicle?
A: Generally, B1476 is isolated to the wiper circuit and will not affect other electrical systems, but if the BCM is faulty, other body functions could potentially be impacted.

Q: Will clearing the code with a scan tool fix the problem?
A: Clearing the code may temporarily turn off the warning, but if the underlying issue is not repaired, B1476 will return as soon as the system detects another fault cycle.