SB54-318 Service Bulletin/Repair Instructions

Cab-to-Chassis Redundant Ground Strap Installation

FLA COE

FLB COE

FLD Conventional

Business Class

FLC 112 Conventional
Century Class Conventional

Argosy

Cargo

Columbia

122SD and Coronado
Business Class M2

Cascadia

108SD/114SD

> New Cascadia
54-318

Freightliner

Service Bulletin
General Information

On New Cascadia vehicles built between January 17, 2019 and May 23, 2019, cab wiring can be damaged with

an incorrect ground location. This can result in inoperable LIN bus-related steering wheel switches, cruise

control dropout, poor AM/FM radio reception, and an inoperable steering wheel clockspring.

Installing a redundant ground strap from the main ground junction block (MGJB) to the frame will protect the

vehicle from unexpected loss of cab grounding, and restore proper operation of the steering wheel switches, the

radio, and the steering wheel clockspring.
Parts

The parts required for this procedure are shown in Table 1.
NOTE: Only one ground cable is required for this procedure.

Parts Required

Part Name

Ground Cable, 52-inch (132 cm)

Ground Cable, 70-inch (178 cm)

1-Inch (2.5 cm) Section Shrink Tubing
Part Number

A06-59499-052

A06-59499-070

—
Quantity

1

1

2
Table 1, Parts Required
Work Instructions

1. Park the vehicle on a level surface, apply the parking brakes, and shut down the engine. Chock the tires.

2. Disconnect the batteries.

3. Use a 13-mm socket to remove the capscrew located below the bulkhead module connector on the main

ground junction block (MGJB), located on he left-hand side of the frontwall. See Fig. 1.
Freightliner Service Bulletin, 10/29/2019
Page 1
54-318

Freightliner

Service Bulletin
Cab-to-Chassis Redundant Ground Strap Installation

FLA COE

FLB COE

FLD Conventional

Business Class

FLC 112 Conventional
Century Class Conventional

Argosy

Cargo

Columbia

122SD and Coronado
Business Class M2

Cascadia

108SD/114SD

> New Cascadia
2
1
10/01/2019
f547028
1. Capscrew
2. Bulkhead Connector
Fig. 1, Removing the Capscrew
4. Scrape a small amount of paint off of the bracket so that the face of the capscrew will have metal-to-metal

contact. See Fig. 2. This ensures that the ground strap and the MGJB have continuity with the frontwall

when the nut is installed.
Page 2
Freightliner Service Bulletin, 10/29/2019
Cab-to-Chassis Redundant Ground Strap Installation

FLA COE

FLB COE

FLD Conventional

Business Class

FLC 112 Conventional
Century Class Conventional

Argosy

Cargo

Columbia

122SD and Coronado
54-318

Freightliner

Service Bulletin
Business Class M2

Cascadia

108SD/114SD

> New Cascadia
A
10/01/2019
f547031
A. Scrape any paint off the area around the capscrew

insertion point.

Fig. 2, Cleaning the Area Around the Bracket
NOTE: Both sleepercabs and daycabs with an under-cab battery box mounting have the same framemounted power ground (GNDP) stud. See Fig. 3.

5. Determine the location for the redundant ground strap.

5.1
Check to see if the battery box is mounted between the frame rail. On vehicles that have a battery

box mounted between the frame rail, there is a ground strap running from the flywheel housing to

the left-hand side frame rail. This is the most accessible frame rail stud for mounting the redundant

ground strap. See Fig. 4.
5.2
If the vehicle has an under-cab battery box, check for a ground stud on the left side outer frame rail.

There will be a difference between applications with frame rail battery box mounting and an undercab battery box mounting, depending on the 282 data code for the build. Vehicles with an under-cab

battery box mounting will not have the ground mounting stud, as shown in Fig. 5. In this case, the

best location is the GNDP stud shown in Fig. 4.
Freightliner Service Bulletin, 10/29/2019
Page 3
54-318

Freightliner

Service Bulletin
Cab-to-Chassis Redundant Ground Strap Installation

FLA COE

FLB COE

FLD Conventional

Business Class

FLC 112 Conventional
Century Class Conventional

Argosy

Cargo

Columbia

122SD and Coronado
Business Class M2

Cascadia

108SD/114SD

> New Cascadia
1
10/01/2019
f547029
Fig. 3, Frame-Mounted Stud for GNDP
10/01/2019
f547030
Fig. 4, Location for the Ground Strap
Page 4
Freightliner Service Bulletin, 10/29/2019
Cab-to-Chassis Redundant Ground Strap Installation

FLA COE

FLB COE

FLD Conventional

Business Class

FLC 112 Conventional
Century Class Conventional

Argosy

Cargo

Columbia

122SD and Coronado
10/01/2019
54-318

Freightliner

Service Bulletin
Business Class M2

Cascadia

108SD/114SD

> New Cascadia
f547032
Fig. 5, Ground Stud on the Left-Hand Side of the

Vehicle
6. Once the stud for the redundant ground strap is determined, remove the nut from the stud. Clean off the

anti-corrosion spray as necessary to ensure clean contact with the face of the existing cable. Install the ring

eye of the new ground cable on the stud, and install the nut. Tighten the nut to 26 lbf·ft (35 N·m).

Determine the correct new redundant ground cable length from the two lengths found in Table 1. Install,

route, and secure the redundant ground cable as needed to avoid rubbing on other components.
IMPORTANT: If the GNDP stud is used for this redundant strap installation, the original GNDP ring

eye must be clean, secure, and tightened properly.

7. Install the other end of the new ground cable to the frontwall using the original capscrew, and tighten 11 to

17 lbf·ft (15 to 23 N·m).

8. Cover the stud on the frame used for this jumper with anti-corrosion spray.

9. Connect batteries.

10. Verify the repair. Use a voltmeter to make sure that there is no voltage present between the frontwall and

the frame in both key ON and key OFF positions.
Warranty

This procedure is warrantable only if the described condition exists and the repair is performed within the

applicable base or extended coverage warranty period. If a failure is not found, this procedure is considered

preventive and warranty does not apply.
Freightliner Service Bulletin, 10/29/2019
Page 5
54-318

Freightliner

Service Bulletin
Cab-to-Chassis Redundant Ground Strap Installation

FLA COE

FLB COE

FLD Conventional

Business Class

FLC 112 Conventional
Century Class Conventional

Argosy

Cargo

Columbia

122SD and Coronado
Business Class M2

Cascadia

108SD/114SD

> New Cascadia
Normal warranty applies. See Table 2 for OWL VMRS codes and labor allowance information. Enter this service

bulletin number in the Service Bulletin # field.
Primary Failed Part

Ground Cable
OWL VMRS Codes and Labor Allowance

Component

Cause Code SRT Code

Description

Code

Cab to Chassis Redundant Ground

032-001-003

03

291-5016A

Strap Installation
Time: Hours

0.7
Table 2, OWL VMRS Codes and Labor Allowance
NOTE: Add the digital photo instructions only if requested by Warranty in their approval routing.

Otherwise, delete the content for approval routing. Attach digital photos directly to the claim on the

Attachments tab.
Page 6
Freightliner Service Bulletin, 10/29/2019

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