B1824 — Wiper Rear Park Sense Input Circuit Short To Battery #

Note: The definition of this code may vary slightly depending on your vehicle’s make and model. Always refer to your OEM (Original Equipment Manufacturer) documentation for precise wording.

• B1824 – Rear Wiper Park Switch Circuit Short to Battery (Ford)
• B1824 – Rear Wiper Park Sense Input Circuit High (GM/Chevrolet)
• B1824 – Rear Wiper Park Position Signal Shorted to Battery (Chrysler/Dodge/Jeep)

Summary of B1824 #

The B1824 code indicates a problem with the electrical circuit that tells your vehicle’s computer whether the rear windshield wiper is parked (resting in its default position). Specifically, it means the park sense input circuit is reading a voltage that suggests a short to battery power, rather than the expected ground or open circuit. This can cause the rear wiper system to behave unpredictably, ignoring commands or failing to stop correctly. The code is typically set when the Body Control Module (BCM)—the computer managing body-related functions—detects this abnormal voltage for a set period. While this is not a safety-critical fault, it can impact the comfort and convenience features of your vehicle.

Frequent Symptoms for Code B1824 #

When B1824 is triggered, several symptoms may appear, usually related to the rear wiper’s behavior. These can be subtle or obvious, depending on the severity of the fault. If you notice anything odd with your rear wiper, this code is worth investigating.

• Rear wiper does not park (rest) in the correct position
• Rear wiper continues running after switching off
• Intermittent or erratic rear wiper operation
• Rear wiper fails to activate
• Possible “Check Wiper System” or similar warning on dashboard

Probable Causes for Code B1824 #

Most issues leading to B1824 are rooted in the rear wiper’s electrical circuit or its related components. Below are the most common causes, ranked by how frequently they occur:

1. Damaged or shorted wiring in the rear wiper park sense circuit
2. Faulty rear wiper park switch (sensor built into the wiper motor assembly)
3. Corroded, loose, or damaged connectors at the rear wiper motor or BCM
4. Faulty rear wiper motor assembly (internal short)
5. BCM (Body Control Module) fault (rare)

Step-by-Step Diagnostic for Code B1824 #

Diagnosing B1824 requires a logical, stepwise approach, starting with the most accessible checks and moving toward more involved procedures. Here’s how a professional or advanced DIY’er should proceed:

• Check for other related codes (especially wiper system codes) and address those first.
• Visually inspect the rear wiper motor, harness, and connectors for obvious signs of damage, corrosion, or moisture intrusion.
• With a multimeter, test for battery voltage at the rear wiper park sense input wire with ignition ON and wiper OFF (should not be present).
• Disconnect the rear wiper motor connector; check the park sense wire for continuity to ground and battery (should be open or grounded, not battery voltage).
• If wiring checks out, test the rear wiper motor’s park switch for internal shorts (refer to OEM wiring diagram for pinouts).
• Check harness continuity between the rear wiper motor and the BCM—look for shorts to power or ground.
• As a last resort, consider a possible BCM issue (rare)—this usually requires advanced diagnostic tools and OEM support.

Possible Repairs for Code B1824 #

The right repair depends on what you uncover during diagnosis. Each probable cause has a specific solution, so avoid guesswork and parts swapping. Here’s what might be required:

• Repair or replace damaged wiring in the rear wiper park sense circuit
• Replace faulty connectors or clean corroded terminals at the wiper motor/BCM
• Replace the rear wiper motor assembly if the park switch is shorted internally
• Replace or reprogram the BCM (only if all other causes are eliminated and verified by OEM procedure)

Is It Safe to Drive with Code B1824? #

Yes, you can generally drive with code B1824 present, because it does not affect critical vehicle safety systems. However, rear visibility in poor weather may be compromised if the wiper does not operate correctly. If you rely on your rear wiper for safe driving, especially in rain or snow, address the issue sooner rather than later.

Vehicles Commonly Affected by Code B1824 #

This code is most often reported in vehicles where the rear wiper system is electronically managed by a BCM. It is especially common in:

• Ford Escape, Explorer, Expedition (2010–2024)
• Chevrolet Equinox, Traverse, Tahoe (2011–2024)
• Jeep Grand Cherokee, Cherokee, Compass (2010–2024)
• Dodge Durango, Journey (2011–2024)
• Other SUVs and hatchbacks with rear wipers and electronic control modules

Common Mistakes & Best Practices for Code B1824 #

It’s easy to head down the wrong path or miss a simple fix with electrical codes like B1824. Here’s what to watch for and how to avoid common pitfalls:

• Assuming the wiper motor is faulty without checking wiring or connectors first
• Overlooking corrosion or moisture in the rear liftgate harness or connector—a frequent culprit
• Replacing the BCM without confirming circuit integrity or verifying the park switch operation
• Not using the correct wiring diagram for your vehicle’s make and model

Express FAQ — Code B1824 #

Still have questions? Here are quick answers to the most common concerns:

• Q: Will clearing the code fix my rear wiper?
  A: No. Clearing the code will temporarily turn off the warning, but the issue will return until the underlying fault is repaired.
• Q: Can I bypass the park sense switch?
  A: Bypassing is not recommended. The system relies on the park sense signal for safe operation and may cause further faults or erratic wiper behavior.