Prevention FAQ — FMCSR 393.62(e) Windshield Wipers

Inspectors test both driver and passenger-side wipers for operation, blade condition, and presence. Our inspection records show 789 all-time citations for this code, with 246 resulting in out-of-service placements at a 31.2% rate—essentially equal to the all-FMCSR average of 31.4%, meaning inspectors enforce this uniformly across the country.

Key inspection points:

• Wipers activate and sweep the full windshield arc
• Blades make contact without streaking or skipping
• No missing or severely deteriorated rubber
• Wiper arms are not bent or misaligned
• Washer fluid system functional (tied to visibility)

Inspectors typically check this during the walk-around or visibility check. If either wiper fails, the violation is cited; if visibility is compromised, an out-of-service order may follow.

Drivers must perform a hands-on functional check every morning and before extended trips:

1. Activation test — Turn on wipers at both low and high settings; confirm smooth movement without chattering or lag.
2. Blade inspection — Visually inspect both blades for cracks, missing rubber, or separation from the arm.
3. Washer fluid level — Check washer reservoir and top up if below 75%.
4. Arm condition — Look for bent, cracked, or loose arms that could reduce sweep coverage.
5. Windshield condition — Note any cracks or debris that wipers cannot clear.

Document the check on the driver vehicle inspection report (DVIR) daily. If any defect is found, mark the vehicle as out-of-service until repair is complete. This proactive step prevents roadside citations and ensures compliance before an inspector observes the defect.

Carriers must maintain:

1. Maintenance records — Log date, odometer, parts replaced (blades, arms, motor), technician name, and sign-off for every wiper service.
2. Parts receipts — Retain invoices showing OEM or equivalent-quality replacement parts.
3. Driver DVIRs — Require drivers to record wiper condition on daily pre-trip reports; flag defects the same day.
4. Inspection schedules — Document your fleet's wiper inspection frequency (recommended quarterly minimum) and audits.
5. Out-of-service records — If a vehicle is taken out of service for wiper failure, note the date, repair completion date, and authorization sign-off.

Keep these records for at least 12 months. If cited, this documentation demonstrates due diligence and can support a DataQs challenge if the citation is inaccurate.

Our inspection database shows windshield wiper citations co-occur with broader vehicle maintenance gaps. While we cannot identify the exact top co-occurring codes for this citation due to low enforcement volume (0 citations in the last 12 months and last 90 days), the pattern across our 13 million records suggests:

• Deferred maintenance culture — Fleets that cite 393.62(e) often have systemic gaps in minor component upkeep, potentially linked to understaffing or budget constraints.
• Lack of seasonal preparation — Wiper failures spike in winter and heavy-rain regions when blade wear accelerates and visibility is critical.
• Reactive vs. preventive approach — Drivers discover wiper failure at roadside rather than during pre-trip checks, indicating insufficient training or oversight.
• Parts quality — Use of low-cost or non-OEM blades that deteriorate faster (our top cited make, FORD, represents 127 citations; ensure replacement blades match OEM spec).

Conduct a root-cause audit: interview drivers about pre-trip procedures, review DVIR submission rates, and assess whether maintenance intervals for wipers are documented and enforced.

After wiper repair or replacement, follow this verification protocol:

1. Two-person sign-off — Have a technician and a safety manager or dispatcher independently test the wipers at low and high speed.
2. Full-arc documentation — Photograph or video-record the wipers sweeping the entire windshield to confirm coverage.
3. Washer system test — Confirm washer fluid is filled and spray reaches the windshield cleanly.
4. Parts verification — Record the exact part numbers, manufacturer, and installation date on the work order.
5. Driver acknowledgment — Have the assigned driver sign the repair order, confirming they tested the wipers and found them operational before taking the vehicle.
6. DVIR entry — Driver must complete a fresh pre-trip DVIR and confirm wiper function before departing.

Do not return a vehicle to the fleet if there is any doubt about wiper function. The cost of a citation (31.2% OOS rate in our data) far exceeds the cost of a replacement blade.

If a driver is cited for 393.62(e), conduct a structured review within 48 hours:

1. Interview the driver — Determine whether the wiper failed since the last pre-trip check, or if the driver missed the defect during inspection.
2. Inspect the vehicle — Examine the wipers, washer system, and DVIR history for that vehicle over the prior 30 days.
3. Review maintenance records — Identify the last scheduled wiper inspection and when blades were last replaced.
4. Assess DVIR compliance — Check whether the driver was submitting daily pre-trip reports and how defects were being reported.
5. Retrain or document — If the driver missed the defect, provide immediate retraining on pre-trip inspection procedures. If the vehicle's maintenance was neglected, escalate to the maintenance supervisor.
6. Correct the record — If the citation is inaccurate (e.g., wipers were functional and the inspector made an error), document your evidence and consider a DataQs challenge.

Use the citation as a trigger to audit similar vehicles in your fleet for the same defect within one week.

Each 393.62(e) citation carries a CSA severity weight of 4, which directly increases your fleet's Vehicle Maintenance BASIC score. Across our 13 million inspection records, this code ranks #782 by citation volume—a lower-frequency violation, but one that still impacts your safety profile when it occurs.

The 31.2% out-of-service rate means nearly one-third of citations result in immediate vehicle removal from service, triggering a more severe CSA intervention and compliance review by your state DOT.

Impact calculation:

• Each citation adds severity points proportional to its weight (4).
• Out-of-service citations compound the score impact.
• Multiple citations in a 12-month window can escalate your BASIC to "high-risk" status, inviting roadside enforcement scrutiny and possible regulatory action.

Prevention ROI: Preventing even 3–5 citations per year by implementing quarterly wiper audits (estimated cost: $200–500 annually) avoids CSA penalties and potential increased insurance premiums. Fleet maintenance improvements pay measurable dividends in your safety profile.

Develop a focused training module covering:

1. Pre-trip inspection routine — Walk drivers through the exact steps: activate wipers, observe blade contact and movement, check for cracks or missing rubber, verify washer fluid.
2. Recognition of defects — Show photos and video of faulty wipers (streaking, skipping, torn blades, bent arms) so drivers know what "inoperative" looks like before an inspector does.
3. When to report vs. fix — Clarify that drivers must immediately report wiper defects to dispatch; they cannot defer or ignore the issue in hope it will work later.
4. Seasonal readiness — Emphasize that winter conditions accelerate wiper wear; schedule blade replacement before winter months.
5. Documentation accountability — Require drivers to sign DVIRs confirming wiper function, making them personally accountable for the pre-trip check.
6. Real-world consequences — Show your fleet's citation data (789 all-time across our database) and explain how a single citation affects CSA scores and safety reputation.

Conduct refresher training quarterly and whenever a citation occurs in your fleet. Make it part of onboarding for all new drivers.

Challenge a 393.62(e) citation if:

1. The wiper was operational — You have photo/video evidence, technician sign-off, or DVIR documentation from the same day showing the wiper functioned before the inspection.
2. The inspection was incomplete — The inspector only checked one wiper or did not actuate the wiper control to verify operation (both driver and passenger wipers must be tested).
3. Environmental factors — The citation was issued after a severe weather event where a previously-good blade was torn by ice or debris; maintenance records prove recent replacement.
4. Documentation error — The citation references the wrong vehicle (VIN mismatch) or was issued to a vehicle not in your fleet.
5. Repair was completed before citation was issued — Your records show the wiper was repaired and verified before roadside inspection occurred.

File a DataQs challenge within 30 days of citation issuance. Attach maintenance records, DVIR logs, photos, and technician sign-offs. Our data shows this code has low enforcement volume (0 citations in the last 12 months), making outlier or erroneous citations easier to identify and contest.

Implement a quarterly audit schedule. Here's why:

Our inspection records show zero citations for 393.62(e) in the last 90 days and last 12 months, indicating enforcement activity is episodic rather than continuous. However, this does not mean the defect has disappeared—it means citations are clustered when inspectors encounter fleets with systemic maintenance gaps.

Recommended audit cadence:

• Every 90 days — Conduct a spot-check audit of 10–20% of your fleet. Visually inspect wipers, test operation, and review DVIR submissions for the period.
• After any citation — Immediately audit all similar vehicle makes and models (our data shows FORD accounts for 127 all-time citations; prioritize Ford units in your fleet).
• Seasonal transitions — Inspect all wipers before winter and spring seasons when weather-related wear increases.
• Pre-inspection prep — Before anticipated roadside inspections or compliance reviews, conduct a full fleet audit.

Documentation from quarterly audits also serves as evidence of due diligence if a citation is later challenged. Log every audit result, defect found, and corrective action taken.