WenmarOpen by Wenmar Pro

Service bulletin TSB23-520-001A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10239463
Published by NHTSA2023-07-17
Manufacturer's numberTSB23-520-001A
Manufacturer's date2023-06-22
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This service bulletin provides instructions to inspect and rewire 120V box in accordance with diagram. Revision to the previous bulletin released.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Vehicles listed
SPARTAN GLADIATOR2021 to 2023
SPARTAN K12021 to 2024
SPARTAN K22021 to 2024
SPARTAN K32021 to 2024
SPARTAN K42021 to 2024
SPARTAN METROSTAR2021 to 2023
SPARTAN MM2021 to 2023
SPARTAN FIRE FC-942021, 2022, 2023, 2024
SPARTAN FIRE GLADIATOR2021, 2022, 2023, 2024
SPARTAN FIRE METROSTAR2021, 2022, 2023, 2024
SPARTAN FIRE METROSTAR RT2021, 2022
SPARTAN FIRE METROSTAR-X2021, 2022, 2023
SPARTAN FIRE S-180 PUMPER2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
24V1810002024-03-07. ELECTRICAL SYSTEM
22V7800002022-10-17. EQUIPMENT:EMERGENCY:SIREN/LIGHTING/STROBES; ELECTRICAL SYSTEM
22V5390002022-07-26. ELECTRICAL SYSTEM
22V3730002022-05-24. EQUIPMENT:EMERGENCY:SIREN/LIGHTING/STROBES:WIRING; ELECTRICAL SYSTEM
21V5670002021-07-26. EQUIPMENT:EMERGENCY:FIRE SUPRESSION; ELECTRICAL SYSTEM
21V3290002021-05-10. ELECTRICAL SYSTEM
20V7620002020-12-10. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB26-520-0012026-04-02. Service bulletin. This service bulletin is about certain vehicles equipped with a LCP80 Kussmaul charger that may fail to initiate the charging operation and instructions on how to inspect and potentially replace the charger.
TSB26-410-0012026-03-05. Service bulletin. This service bulletin is about certain vehicles equipped with ZeroRPM that may possess default settings that do not prioritize the charging of the chassis equipped lead acid batteries.
CSB25-500-0012026-01-08. Service bulletin. This service bulletin is about certain vehicles equipped with a Weldon Hercules HC 1.8 node giving timing errors when combined with the Whelen Core and Core R and instructions on how to update the OS version on the node.
TSB24-500-0012024-07-03. Service bulletin. This service bulletin is about certain vehicles equipped with a Weldon HC node that may prevent certain functions from working properly and the instructions on how to update the node operating system.
TSB23-880-0012023-07-17. Service bulletin. This service bulletin provides instructions on how to properly install the RCM after shipped short due to a supplier shortage.
TSB23-520-0012023-05-01. Service bulletin. This service bulletin provides instructions to inspect and rewire 120V box in accordance with diagram.
TSB212500032021-11-08. Service bulletin. This service bulletin provides instructions to replace with new height control valves for front IFS height control valves that may fail.
TSB21-160-0032021-06-21. Service bulletin. This service bulletin provides instructions to correct pin orientation at A/C compressor connector