NHTSA ID Number: 11007503
Manufacturer Communication Number: TSB54-095-WST
TSB/Document Date: 2024-09-07
Summary
Revised Technical Service Bulletin for New Battery Cable Access (BCA) Parts for Improved Cold Weather Functionality. Description of Revisions: This bulletin replaces the version dated 07/30/2024. Make has been updated in the described condition.
54-095 New Battery Cable Access (BCA) Parts for
Improved Cold Weather Functionality
TSB-54-095-WST
Creation Date:2024-07-30
Last Revision Date:2024-08-14
Engine or Vehicle Affected:
»57X
» 49x
» 47x
Description of Revisions: This bulletin replaces the version dated
07/30/2024. Make has been updated in the described condition.
This is an informational bulletin only. The described condition is a product improvement and is not warrantable.
Described Condition
In some Western Star
vehicles, the battery cable access (BCA) module, which includes an internal high current
contactor, has been found to operate inconsistently in temperatures that fall below -4°F (-20°C). This issue tends
to surface each winter, particularly in vehicles left parked overnight in conditions where the temperature dips
below -4°F (-20°C). The problem becomes apparent when the cab load disconnect switch (CLDS) is switched to
the off position.
Beginning on April 14, 2024, new BCA module part numbers, which contain new electronic sub-components to
address this performance issue, are being installed on all products. These BCAs will function correctly down to
-40°F (-40°C). The new contactors will be available for servicing vehicles.
w Note: Part A66-36856-026 can be used to replace many existing parts. However, it
is necessary to confirm fuse ratings and to move the circuit breaker, if equipped, from
the BCA being replaced.
The new part number will enable the contactor in the BCA to switch on and off at temperatures down to -40°F
(-40°C). See Table 1.
Parts Required
Table 1, Part Required
Old Part Number New Part Number Description
A66-01830-002 A66-36856-000 MDL-BCA,BL W/CNTR
A66-01830-003 A66-36856-064 MDL-BCA\NG BL W/CNTR
A66-01862-002 A66-36856-002 MDL-BCA,XMC BL W/CNTR
A66-01862-003 A66-36856-066 MDL-BCA,NG XMC BL W/CNTR
A66-01882-010 A66-36856-004 MDL-BCA,HL NO/CB W/CNTR
Old Part Number
New Part Number
Description
A66-01882-011
A66-36856-068
MDL-BCA\NG HL NO/CB W/CNTR
A66-01882-012
A66-36856-005
MDL-BCAHL 150/CB W/CNTR
A66-01882-013
A66-36856-006
MDL-BCA,HL 90/CB W/CNTR
A66-01882-014
A66-36856-069
MDL-BCA,HL NG 150/CB W/CNTR
A66-01882-015
A66-36856-070
MDL-BCA,HL NG 90/CB W/CNTR
A66-10291-005
A66-36856-010
MDL,BCA,APS3 HL NO CB W/CNTR
A66-10291-006
A66-36856-011
MDL,BCA,APS3 HL 150CB W/CNTR
A66-10291-007
A66-36856-012
MDL,BCA,APS3 HL 90CB W/CNTR
A66-10291-008
A66-36856-013
MDL,BCA,APS3 HL NO CB W/CNTR,END
A66-10291-009
A66-36856-014
MDL,BCA,APS3 HL 150CB W/CNTR,END
A66-10291-010
A66-36856-015
MDL,BCA,APS3 HL 90CB W/CNTR,END
A66-10510-001
A66-36856-022
MDL,BCA,APS3 BL W/CNTR
A66-10510-002
A66-36856-023
MDL,BCA,APS3 BL W/CNTR.END
A66-11729-005
A66-36856-026
MDL,BCA,APS3 XMC NO CB W/CNTR
A66-11729-006
A66-36856-027
MDL,BCA,APS3 XMC 150CB W/CNTR:
A66-11729-007
A66-36856-028
MDL,BCA,APS3 XMC 90CB W/CNTR
A66-11729-008
A66-36856-029
MDL,BCA,APS3 XMC NO CB W/CNTREND
A66-11729-009
A66-36856-030
MDL,BCA,APS3 XMC 150CB W/CNTR,END
A66-11729-010
A66-36856-031
MDL,BCA,APS3 XMC 90CB W/CNTR,END.
A66-11731-001
A66-36856-038
MDL,BCA,APS3 XMC BL W/CNTR
A66-11731-002
A66-36856-039
MDL,BCA,APS3 XMC BL W/CNTR,END
A66-11733-010
A66-36856-042
MDL,BCA,XMC NO/CB W/CNTR
A66-11733-011
A66-36856-074
MDL,BCA,NG XMC NO/CB W/CNTR
A66-11733-012
A66-36856-043
MDL,BCA,XMC 150/CB W/CNTR
A66-11733-013
A66-36856-044
MDL,BCA,XMC 90/CB W/CNTR
A66-11733-014
A66-36856-075
MDL,BCA,XMC NG150/CB W/CNTR
A66-11733-015
A66-36856-076
MDL,BCA,XMC NG 90/CB W/CNTR
A66-18645-002
A66-36856-048
MDL-BCA,BL W/CNTR.ETN END
A66-18645-003
A66-36856-080
MDL-BCA,BL W/CNTR,ETN END,NG
A66-18647-002
A66-36856-050
MDL-BCA,XMC BL W/CNTR,ETN END
A66-18647-003
A66-36856-082
MDL-BCA,XMC BL W/CNTR,ETN END,NG
A66-18649-008
A66-36856-052
MDL-BCA,HL NO/CB W/CNTR,ETN END
A66-18649-009
A66-36856-053
MDL-BCA\HL 150/CB W/CNTR
A66-18649-010
A66-36856-054
MDL-BCA\HL 90/CB W/CNTR
A66-18649-011
A66-36856-084
MDL-BCA,HL NO/CB W/CNTR,ETN END,NG
A66-18649-012
A66-36856-085
MDL-BCA\HL 150/CB W/CNTR,NG
A66-18649-013
A66-36856-086
MDL-BCA,HL 90/CB W/CNTR,NG
A66-18651-008
A66-36856-058
MDL,BCA,XMC NO/CB W/CNTRETN END
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TSB/Document ID: TSB54-095-WST
Replacement Service Bulletin Number:
MFR Communication Date: 2024-08-14
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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