B3703 – Intermittent Wiper Delay Input Circuit High/Open (BCM)

System: Body | Standard: ISO/SAE Controlled | Fault type: Circuit Intermittent

Definition source: SAE J2012 naming/structure guidance (verify exact wording against your official DTC dataset)

What Does B3703 Mean?

B3703 – Intermittent Wiper Delay Input Circuit High/Open (BCM) is an ISO/SAE controlled Body system diagnostic trouble code that indicates a circuit intermittent fault type. The Body Control Module (BCM) has detected that the intermittent wiper delay input circuit is not stable and, at times, appears high or open.

In practical terms, the BCM is intermittently receiving an invalid or missing delay input signal. Because the BCM relies on this input to interpret the requested intermittent wipe delay, the intermittent wipe function may not respond consistently to the driver’s delay selection. The code description is specific: it is not a general wiper motor fault, and it is not a confirmed component failure by itself. It is a BCM-detected condition where the input circuit intermittently reads as a high signal or an open circuit.

Quick Reference

• Code: B3703
• Official Title: B3703 – Intermittent Wiper Delay Input Circuit High/Open (BCM)
• System: Body
• Standard classification: ISO/SAE Controlled
• Fault type to enforce: Circuit Intermittent
• What the BCM detected: The intermittent wiper delay input circuit intermittently appears high or open
• Primary area to inspect: Delay input circuit wiring, terminals, and connectors between the input device and the BCM (using the vehicle wiring diagram)

Symptoms

When B3703 is present, symptoms—if noticeable—tend to involve intermittent wiper delay behavior because the BCM is not consistently interpreting the delay input. Depending on vehicle configuration and how the BCM reacts to an unstable input, symptoms may include:

• Intermittent (delay) mode not operating as expected
• Intermittent wipe timing changes unexpectedly (delay not matching the selected setting)
• Intermittent function becomes inconsistent (works sometimes, fails other times)
• Wipers may not respond correctly to delay adjustments
• Stored BCM code with or without a driver-facing warning, depending on instrument cluster strategy

Common Causes

B3703 is set because the BCM sees the intermittent wiper delay input circuit intermittently reading high or open. Causes that can create an intermittent high/open input condition include:

• Intermittent open in the delay input circuit wiring (broken conductor strands, intermittent continuity loss, or high resistance that behaves like an open at times)
• Loose, corroded, contaminated, or damaged connectors/terminals in the delay input circuit path (including poor terminal tension or partially backed-out terminals)
• Intermittent fault in the delay input device (the component providing the delay input to the BCM, as defined by the vehicle’s wiring diagram)
• Short-to-voltage on the delay input signal wire that intermittently forces the circuit high
• Power or ground issue affecting the input circuit that results in an intermittently invalid/high reading at the BCM
• BCM connector pin-fit or internal BCM input fault (consider only after the external circuit and input device are verified)

Diagnosis Steps

Diagnosing B3703 requires confirming that the intermittent wiper delay input circuit is intermittently high or open as detected by the BCM. Because the fault type is intermittent, testing should focus on reproducing the condition and verifying circuit integrity under the conditions where the fault occurs.

1. Confirm the code in the BCM. Use a scan tool capable of accessing body codes. Record B3703 and any additional BCM/network codes. Save available failure records or freeze-frame-like data if provided.
2. Verify wiper operation and the symptom pattern. Operate the wipers through all modes, paying attention to intermittent/delay function behavior and any inconsistency when changing the delay setting.
3. Check BCM live data for the delay input (if available). Locate the data parameter that corresponds to the intermittent wiper delay input circuit. Move the delay control through its range and look for dropouts, implausible transitions, or a reading that intermittently indicates a high/open state.
4. Perform a visual inspection of the relevant circuit path. Using the wiring diagram, identify the input device, the BCM connector pin, and intermediate connectors/splices. Inspect for damaged insulation, strained wiring, signs of contamination/moisture, or prior repairs that could create an intermittent connection.
5. Wiggle test while monitoring input status. With the wipers in a mode where the BCM reads the delay input, gently move harness sections and connectors associated with the delay input circuit while watching the scan tool data. If the input status changes or glitches, isolate the specific segment.
6. Inspect terminals and connector fit. Follow service information for safe disconnect procedures. Check for bent pins, poor terminal tension, corrosion, pushed-out terminals, or damaged locks. Correct any mechanical/terminal issues before deeper circuit measurements.
7. Continuity and resistance testing of the delay input circuit. With connectors disconnected as required, verify continuity from the delay input source to the BCM pin. Measure resistance and repeat while gently flexing the harness to expose intermittent opens or high resistance.
8. Check for short-to-voltage (intermittent high). Test whether the delay input signal wire is being unintentionally pulled high by contact with a power feed. Use the wiring diagram to determine expected voltages/states, and test in a way that prevents module damage.
9. Verify the input device output per wiring diagram. Confirm the input device produces the expected signal/state changes when the delay is adjusted. If the circuit to the BCM is intact but the source signal is unstable or intermittently open/high, the input device or its immediate connector/power/ground may be at fault.
10. Evaluate BCM involvement only after the circuit is proven good. If the input source and wiring/terminals test correctly and the condition is still present at the BCM connector pin, follow service information for BCM pin testing and module evaluation.
11. Clear codes and confirm the repair. After repairs, clear B3703 and recheck operation. Repeat the conditions that previously triggered the intermittent fault and confirm the BCM input remains stable and B3703 does not reset.

Possible Fixes

Fixes for B3703 must address the reason the BCM is seeing an intermittent high/open condition on the intermittent wiper delay input circuit. Depending on test results, repairs may include:

• Repairing wiring damage in the intermittent wiper delay input circuit (restore continuity, correct high resistance, repair opens)
• Repairing connector/terminal issues (clean contamination, correct corrosion damage, replace terminals with poor tension, ensure proper seating and locking)
• Correcting a short-to-voltage affecting the delay input signal wire
• Restoring proper power/ground to the input circuit where testing shows an intermittent supply or ground condition contributing to an invalid/high/open input reading
• Replacing the delay input device only if testing confirms it intermittently produces an incorrect high/open condition and the circuit integrity is verified
• BCM repair/replacement or reconfiguration only if the fault is verified at the BCM after all external circuit and input checks are passed and service procedures direct module action

Can I Still Drive With B3703?

You may be able to drive with B3703 present, but the primary concern is visibility. Because the code relates to the BCM intermittently detecting a high/open condition in the intermittent wiper delay input circuit, the intermittent wiper function may be unreliable. If weather or road spray requires consistent wiper control, the vehicle may not be safe to operate until the issue is corrected. If conditions are dry and visibility is not affected, driving may still be possible; however, the fault should be diagnosed and repaired to restore predictable wiper operation.

Last updated: March 22, 2026

circuit. Always use the vehicle-specific wiring diagram to identify the correct input circuit, connector cavities, and expected signal behavior.

Can B3703 be caused by corrosion in connectors?

Yes. Corrosion can increase resistance, reduce terminal contact quality, and create intermittent opens. Any corrosion found at the wiper input connector(s) or BCM connector should be corrected, and the circuit should be retested to verify the input no longer intermittently reads high/open.

If I clear B3703 and it comes back later, what does that indicate?

A returning B3703 typically indicates the underlying intermittent condition is still present. Because the fault type is circuit intermittent, the code may reset only when the BCM again detects the intermittent wiper delay input circuit reading high or open under the right conditions (such as vibration, harness movement, temperature changes, or switch actuation).

Does B3703 affect low and high wiper speeds?

B3703 specifically relates to the intermittent wiper delay input circuit monitored by the BCM. Depending on the vehicle’s design, low and high speeds may still operate normally, while intermittent/delay operation is incorrect or unstable. The exact behavior depends on how the BCM uses the delay input to control wiper functions.

What information do I need before electrical testing?

To test accurately without guessing, obtain the vehicle-specific wiring diagram and service information for the intermittent wiper delay input circuit, including connector views, pinouts, splice locations, and the specified signal expectations. This helps you confirm whether the BCM should see a particular voltage, resistance range, or discrete state changes for the delay input on that vehicle.