Wiper Wash/Wipe Delay Switch Circuit Open
The Body Control Module (BCM) or Generic Electronic Module (GEM) has detected an open circuit in the signal from the wiper wash/wipe delay switch. This switch is integrated into the multifunction switch on the steering column and uses a resistor network to send different voltage levels to the module based on the selected position. Code B1451 indicates that the module does not detect continuity in this switch's signal circuit, preventing the delay and wash modes from functioning.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty multifunction switch (wiper stalk) with internal failure
- Open circuit in the wiring between the multifunction switch and the BCM/GEM
- Multifunction switch connector disconnected, damaged, or with corroded terminals
- Internal BCM/GEM failure (uncommon)
3. Symptoms You Will Notice
- Wiper delay and wash functions inoperative
- Wiper intermittent mode not working
- Possible wiper system malfunction indicator on dash
4. Step-by-Step Diagnosis
Scan for B1451 and any related codes
Inspect multifunction switch connector for damage, corrosion, or loose pins
Test continuity and resistance in the signal wire between switch and BCM/GEM
If wiring is good, replace the multifunction switch
If problem persists, test BCM/GEM input and consider module replacement
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive, but you will lose wiper delay and wash functions. Standard wiper speeds may still work. Have it repaired soon to restore full functionality.
How much does it cost to fix?▼
Typical repair cost ranges from $150 to $400, including parts (multifunction switch $50-$150) and labor. If the BCM needs replacement, cost can exceed $600.