TruckCodex

393.28 — Wiring - improper/inadequate

FMCSA violation code under Vehicle Maintenance. 6,422 events recorded in roadside inspections. Severity weight: 3.

Severity Weight
3
OOS Eligible
No
BASIC Category
Vehicle Maintenance
Total Events
6,422
Code
393.28
Code System
FMCSR
BASIC Category
Vehicle Maintenance
OOS Eligible
No
Severity Weight
3
Violation Group
BASIC 5
Total Events
6,422
Carriers Cited
4,820

Violation Description

CMV electrical wiring is improperly installed, insecure, or inadequately protected.

About This Violation Code

Code 393.28 falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS). It carries a severity weight of 3 (scale 1-10, higher = more severe).

When this violation is cited during a roadside inspection, it contributes to the carrier's Vehicle Maintenance BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.

Regulatory Reference

Federal Motor Carrier Safety Regulations

This violation references 49 CFR 393.28 in the Federal Motor Carrier Safety Regulations.

View on eCFR.gov →FMCSA Violations Search →
Events (all time)
6,422
OOS Events
102
OOS Rate
1.6%
Top State (180d)
Texas
750 events

Top Enforcing States

Where 393.28 is most commonly cited (last 180 days)

1.Texas
750
OOS 0.3%
2.Illinois
21
OOS 19.0%
3.Iowa
6
OOS 16.7%
4.New Mexico
4
OOS 0.0%
5.North Carolina
2
OOS 0.0%

Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.

Citation Trend (12 months)

Monthly count of 393.28 citations. Red bars mark months with OOS-triggering citations.

48
Apr
129
May
107
Jun
131
Jul
107
Aug
103
Sep
148
Oct
130
Nov
124
Dec
157
Jan
163
Feb
134
Mar
6
Apr

Most Active Stations

Inspection stations citing 393.28 most often (last 180 days)

1.VETERANS POE
60
OOS 0.0%
2.INDIOS POE
58
OOS 0.0%
3.PHARR POE
38
OOS 0.0%
4.CAMINO REAL POE
31
OOS 0.0%
5.US-0290 IN HARRIS CO. (706-738
20
OOS 0.0%
6.IH35 SB SAN MARCOS SCALE
20
OOS 0.0%
7.SH-0225 IN HARRIS CO. (686-700
17
OOS 0.0%
8.US77 RIVIERA SCALE
9
OOS 0.0%
9.TX21 SCALES
7
OOS 0.0%
10.I-57, TROOP 7
6
OOS 66.7%

Often Cited Together

Other violations commonly found on the same inspection (last 90 days)

393.9276 co-occurrences393.45B2UV137 co-occurrences393.78110 co-occurrences392.2RG95 co-occurrences393.1191 co-occurrences396.5B90 co-occurrences393.47E74 co-occurrences396.3A169 co-occurrences396.17C68 co-occurrences393.95A66 co-occurrences

Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).

Top Carriers Cited

Ranked by frequency • 4,820 carriers total • Page 1 of 193

Top Carriers with 393.28 Violations

Showing 25 of 4,820

fmcsa-violations
Top Carriers with 393.28 Violations
#CarrierUSDOT# Violations
#1RUBEN CARLOS TREVINO SANCHEZ164968965
#2RS TRANSFER SA DE CV115682535
#3ROLANDO VILLANUEVA NAVARRO55915122
#4TRANSPORTES DE CARGA SAUL SALINAS SA DE CV55767618
#5AUTOTRANSPORTES FRONTERIZOS MG SA DE CV177053414
#6EVANS DELIVERY COMPANY INC3811113
#7AGGREGATE HAULERS I L P102148513
#8JOSE ALONSO SARMIENTO TORRES228999213
#9TNE SA DE CV388670410
#10JESUS MA VALDEZ GARCIA253478410
#11ALEJANDRA ESQUIVEL FERNANDEZ235107310
#12DANIEL ERNESTO PENA COTA164763910
#13AUTOTRANSPORTES VARELA DAVILA SA DE CV171682410
#14GULF WINDS INTERNATIONAL INC69014710
#15TRANSPORTE INTERNACIONAL JONICK LOPEZ SA DE CV8209819
#16JAIME FERNANDO PALAFOX VILLEGAS21779289
#17WESTERN EXPRESS INC5114129
#18TRANSPORTES BRECA SA DE CV23067178
#19TSG INTERNATIONAL LLC20656288
#20JORGE MANUEL PEREA CANALES9321508
#21AUTOTRANSPORTE CA-RI SA DE CV17592468
#22SERVICIOS ESPECIALIZADOS ALANIS SA DE CV5594778
#23TRAREYSA SA DE CV24127868
#24TGM DEL NORTE SA DE CV19888077
#25AUTOTRANSPORTES ROMEDU SA DE CV11482597

Recent Inspections

Latest inspections where 393.28 was cited • 6,422 total events • Page 1 of 257

Recent Inspections with 393.28

Showing 25 of 6,422

fmcsa-inspections
Recent Inspections with 393.28
DateReport #StateLevelOOS
Apr 2, 202687487211TXLevel 1No
Apr 2, 202687487092TXLevel 2No
Apr 2, 202687486827ILLevel 1No
Apr 1, 202687488124TXLevel 1No
Apr 1, 202687479288TXLevel 1No
Apr 1, 202687487601TXLevel 1No
Mar 31, 202687468885TXLevel 1No
Mar 31, 202687464589NMLevel 1No
Mar 31, 202687468385TXLevel 1No
Mar 31, 202687487529TXLevel 2No
Mar 31, 202687479358TXLevel 1No
Mar 30, 202687468839TXLevel 1No
Mar 30, 202687468840TXLevel 1No
Mar 30, 202687479183TXLevel 1No
Mar 30, 202687453034IALevel 2No
Mar 30, 202687453606ILLevel 1No
Mar 30, 202687466779TXLevel 2No
Mar 30, 202687467398TXLevel 2No
Mar 30, 202687467563TXLevel 2No
Mar 28, 202687479568TXLevel 2No
Mar 28, 202687479105TXLevel 2No
Mar 28, 202687443332TXLevel 1No
Mar 28, 202687443334TXLevel 1No
Mar 27, 202687443249TXLevel 2No
Mar 27, 202687441992TXLevel 2No

Data sources & freshness

FMCSA Vehicle Inspections and Violations
Updated 3 months ago
Federal Motor Carrier Safety Regulations (49 CFR)
Unknown freshness

Related records

CategoryAll Vehicle Maintenance Violations
Browse all violation codes in the Vehicle Maintenance BASIC
IndexAll Violation Codes
FMCSR violation codes by BASIC category
ReferenceFMCSA Roadside Inspections
Inspection levels and procedures
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