Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

Subject: Freightliner Snow Plow Light Harness
Models Affected: Specific model years 2022-2024 Freightliner
108SD and 114SD vehicles, manufactured November 9, 2021,
through July 24, 2023.

General Information
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks division, is initiating Field Service
Campaign SF678 to modify the vehicles mentioned above.
For certain vehicles, equipped with snow plows, the headlamps are inadvertently allowed to be active when the
plow lights are active, resulting in the possibility of the headlamps reflecting off the rear of the plow, back
towards the driver.
A new snow plow light harness and switch will be installed, and the lighting parameters will be updated to
deactivate headlamps when the snow plow lights are activated.
There are approximately 179 vehicles involved in this campaign.
Additional Repairs
Dealers must complete all outstanding recall and field service campaigns prior to the sale or delivery of a
vehicle. A dealer will be liable for any progressive damage that results from its failure to complete campaigns
before sale or delivery of a vehicle.
Owners may be liable for any progressive damage that results from failure to complete campaigns within a
reasonable time after receiving notification.
Please contact Warranty Campaigns for consideration of additional charges prior to performing the repair.

Work Instructions
Please refer to the attached work instructions. Prior to performing the campaign, check the vehicle for a
completion sticker (Form WAR261).

Replacement Parts
Replacement parts are now available and can be obtained by ordering the part numbers listed below from your
facing Parts Distribution Center (PDC).
If our records show your dealership has ordered any vehicle(s) involved in campaign number SF678, a list of
the customers and vehicle identification numbers will be available on the DTNA Portal via OWL. Please refer to
this list when ordering parts for this campaign.
Table 1 - Replacement Parts for SF678
Campaign
Number

SF678 A

Part Number

Part Description

Qty.

A66-14104-040
TSU CT44FRT033

SW-MSF,HWD,PLOW LIGHT
PLOW LIGHT DASH HARN ( Fig. 1 )
PLOW INTERFACE GND CHAS HARN ( Fig. 2 )
TERMINAL
SEAL-CABLE,FMALE,METRI-PACK150
FUSE - MINI, 5AMP, MP280
BLANK COMPLETION STICKER

1 ea

TSU CT44FRT034
PAC 12045773 L
PAC 15324973 B
BUS BK/ATM 5
WAR261

Table 1

Page 1

1 ea
1 ea
2 ea
2 ea
1 ea (use dealer stock)
1 ea

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

09/25/2023

f548275

Fig. 1, Inside Cab Dash Harness (TSU CT44FRT033)

09/25/2023

f548274

Fig. 2, Underhood Plow Harness (TSU CT44FRT034)

Removed Parts
U.S. and Canadian Dealers, please follow Warranty Failed Parts Tracking shipping instructions for the
disposition of all removed parts. Export distributors, please destroy removed parts unless otherwise advised.

Labor Allowance
Table 2 - Labor Allowance
Campaign
Number

Procedure

Time Allowed
(hours)

SRT Code

Corrective Action

SF678 A

Install Light Harness & Switch,
Update Lighting Parameters

4.5

996-F173A

12-Repair Recall/Campaign

Table 2

Page 2

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

IMPORTANT: When the campaign has been completed, locate the base completion label in the appropriate location on the vehicle, and attach the gray completion sticker provided in the field service kit (Form WAR261). If
the vehicle does not have a base completion label, clean a spot on the appropriate location of the vehicle and
first attach the base completion label (Form WAR259). If a field service kit is not required or there is no completion sticker in the kit, write the campaign number on a blank sticker and attach it to the base completion label.

Claims for Credit
You will be reimbursed for your parts, labor, and handling (landed cost for Export Distributors) by submitting
your claim through the warranty system within 30 days of completing this campaign. Please reference the
following information in OWL:
• Claim type is Field Service Campaign.
• In the Campaign field, enter the campaign number and appropriate condition code (SF678-A).
• In the Primary Failed Part field, enter 25-SF678-000.
• In the Parts section, enter the appropriate part numbers as shown in the Replacement Parts Table.
• In the Labor section, enter the appropriate SRT from the Labor Allowance Table. Administrative time will
be included automatically as SRT 939-6010A for 0.3 hours.
• The VMRS Component Code is F99-999-005 and the Cause Code is A1 - Campaign.
• This Field Service Campaign will terminate on November 30, 2024. Dealers will be notified of any
changes to the termination date via an Important Campaign Information Letter (ICI) posted on the DTNA
Portal.
IMPORTANT: OWL must be viewed prior to beginning work to ensure the vehicle is involved and the campaign
has not previously been completed. Also, check for a completion sticker before beginning work.
All claims must be submitted within 30 days of the repair and within 30 days of the termination date of the
campaign. U.S. and Canadian Dealers: All excess inventory to be returned to the PDC following the conclusion
of the campaign must be returned in resaleable condition to the Memphis PDC within 90 days from the
termination date. Please submit a PAR to request return to the Memphis PDC. (Canadian dealers should return
the kits to their facing PDC.) Export Distributors: Excess inventory is not returnable.
For questions, U.S. and Canadian dealers, contact the Warranty Campaigns Department using the Warranty
Support Center (WSC) app located on the DTNA Portal. Export distributors submit a WSC inquiry or contact
your International Service Manager.

Page 3

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

Copy of Notice to Owners
Subject: Freightliner Snow Plow Light Harness
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks division, is initiating Field Service
Campaign SF678 to modify specific model years 2022-2024 Freightliner 108SD and 114SD vehicles,
manufactured November 9, 2021, through July 24, 2023.
For certain vehicles, equipped with snow plows, the headlamps are inadvertently allowed to be active when the
plow lights are active, resulting in the possibility of the headlamps reflecting off the rear of the plow, back
towards the driver.
A new snow plow light harness and switch will be installed, and the lighting parameters will be updated to
deactivate headlamps when the snow plow lights are activated.
Please contact an authorized DTNA dealer to arrange to have the campaign performed and to ensure that parts
are available at the dealership. The campaign will take approximately four and one half hours and will be
performed free of charge. To locate an authorized dealer, search online at northamerica.daimlertruck.com/
contact-us. Scroll down to “Locate a Dealer,” and select the appropriate brand.
This Field Service Campaign will terminate on November 30, 2024. Please make sure the campaign is
completed prior to this date. Work completed after this date will be done at the customer’s expense.
As stated in the terms of your express limited warranty, DTNA will not pay for any damage caused by failure to
properly maintain your vehicle. DTNA considers the work necessary under this campaign to be proper
maintenance and will, therefore, not pay for any damage to your vehicle caused by your failure to have the
repairs that are the subject of this campaign performed in a reasonable time.
If you have any questions, contact the Warranty Campaigns Department at (800) 547-0712, 7 a.m. to 4 p.m.
Pacific Time, Monday through Friday, e-mail address [email protected], or
contact the Customer Assistance Center at (800) 385-4357.
WARRANTY CAMPAIGNS DEPARTMENT
Enclosure

Page 4

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

Work Instructions
Subject: Freightliner Snow Plow Light Harness
Models Affected: Specific model years 2022-2024 Freightliner
108SD and 114SD vehicles, manufactured November 9, 2021,
through July 24, 2023.

Snow Plow Light Harness
The instructions that follow involve installation of wiring harnesses in the dash and the engine compartment to
modify the headlight function so that the headlights are interrupted when the plow lights are turned on. To aid in
visualizing the repair, see the plow light wiring modification schematics shown in Fig. 3, page 6.
NOTE: The inside cab dash harness TSU CT44FRT033, shown in Fig. 1, page 2 and below, was originally designed for another vehicle model. It will work on Business Class M2 Plus, but due to routing differences, there
will be considerable additional length of wiring in some of the circuits. It will be necessary to either bundle and
secure the additional harness length, or cut the wires short as needed. It also may be necessary to untape
some portions of the harness to gain the length needed to route the wiring.
NOTE: The brown wire in the harness (TSU CT44FRT033) will not be used in this installation.

09/25/2023

f548275

Fig. 1, Inside Cab Dash Harness (TSU CT44FRT033)

Page 5

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

A
11/07/2023

f548404

A. The schematics on the right-hand side of these splices depicts the installation of inside cab dash harness

(TSU CT44FRT033). The two wires on the left-hand side of the splices depict the underhood plow harness
(TSU CT44FRT034).

Fig. 3, Schematic - Snow Plow Light Wiring Modification

1.

Check the base label (Form WAR259) for a completion sticker for SF678 (Form WAR261), indicating this
work has been done. The base label is usually located on the passenger-side door, about 12 inches (30 cm)
below the door latch. If a completion sticker is present, no work is needed. If a completion sticker is
not present, proceed to the next step.

2.

Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.

3.

Disconnect the battery cables.

4.

Follow the substeps to remove the dash covers. For more information, see Section 60.08 of the Business
Class M2 Plus Workshop Manual.

Page 6

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A
4.1

Remove the passenger-side lower access cover. See Fig. 4.

11/06/2023

f602985a

Fig. 4, Passenger-Side Lower Access Cover

4.2

Remove the passenger-side upper dash fascia. See Fig. 5.

11/06/2023

f602986a

Fig. 5, Passenger-Side Upper Dash Fascia

Page 7

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A
4.3

Remove the upper center fascia panel. Remove the power receptacle harness from the socket.
See Fig. 6.

11/06/2023

f602987a

Fig. 6, Upper Center Fascia Panel

4.4

Remove the dash top tray. See Fig. 7.

11/06/2023

f602988a

Fig. 7, Dash Top Tray

Page 8

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A
4.5

Remove the footwell lamp and diagnostic connector retaining nut from the driver-side lower dash
cover, then remove the driver-side lower dash cover. See Fig. 8.

11/06/2023

f602989a

Fig. 8, Driver-Side Lower Dash Cover

4.6

Remove the park brake knobs.

4.7

Remove the steering column cover.

4.8

Remove the driver-side upper dash fascia. See Fig. 9.
1

2
05/30/2023

1. Driver-Side Upper Dash Fascia

f602990

2. Fasteners
Fig. 9, Driver-Side Upper Dash Fascia

Page 9

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

4.9

Remove the lower dash cover. See Fig. 10.

NOTE: If the vehicle does not have a removable lower cover, as shown in Fig. 10, the center dash panel
(doghouse) has to be removed. For instructions to remove the center dash panel, see Section 60.08 of the
Business Class M2 Plus Workshop Manual.

11/06/2023

f548238a

Fig. 10, Lower Dash Cover

Page 10

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A
NOTE: The switch panel does not need to be completely removed, it can be laid aside with some or all the
wiring attached. It is only necessary to gain access behind the panel.
4.10 Remove the center dash switch panel containing the modular switch field (MSF) switches.
See Fig. 11.

11/06/2023

f602993a

Fig. 11, Center Dash Switch Panel

Page 11

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

5.

Remove the interior vehicle power distribution module (VPDM), shown in Fig. 12. For instructions, see
Section 54.06, Subject 100 of the Business Class M2 Plus Workshop Manual.

03/28/2023

f548156

Fig. 12, Interior VPDM

6.

Begin routing the harness (TSU CT44FRT033) starting from behind the center dash switch panel shown in
Fig. 13.

A

11/06/2023

f548238b

A. Begin routing of the dash harness in the space behind the center dash switch panel.
Fig. 13, Dash Harness Routing Starting Point

Page 12

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

NOTE: The two relays and the portion of wiring with the 6-pin connector (pink and red wire) will remain in the
space behind the center dash switch panel.
7.

Route the two blue and two black wires to the SSAM in the path shown in Fig. 14 and Fig. 15.

A

B

11/03/2023

f548421

A. Start routing the harness behind the center dash switch panel from here. The two relays remain in this location.
B. Routing path of the longer black and blue pair of wires and the shorter black and blue pair of wires to the SSAM.
Fig. 14, Routing of the Two Black and Blue Wire Pairs to the SSAM

Page 13

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A

X2

A

X10

B

11/03/2023

f547938a

A. Shorter pair of black and blue wires.
B. Longer pair of black and blue wires.
Fig. 15, Routing of the Longer and Shorter Pair of
Black and Blue Wires to the SSAM

IMPORTANT: There is a shorter blue and black pair of wires, and a longer blue and black pair. The longer blue
and black pair of wires has to be routed to the SSAM X10 connector. The shorter blue and black pair of wires
has to be routed to the SSAM X2 connector.
IMPORTANT: It is critical that the two longer wires that originate at relay 2 get terminated at the SSAM X10 connector and the shorter wires that originate at relay 1 get terminated at the SSAM X2 connector.
NOTE: There will be excess wiring. The excess wiring should be bundled up and secured behind the center
dash switch panel.
8.

Remove the wire from pin 1 of the SSAM X10 connector and replace it with the longer black wire. Splice
the wire removed from pin 1 of the SSAM X10 connector to the longer blue wire.

Page 14

Daimler Truck
North America LLC

Field Service Campaign

November 2023
SF678 A
8.1

Remove the X10 connector from the SSAM. See Fig. 16.
1