NHTSA ID Number: 10119498
Manufacturer Communication Number: 42-64
TSB/Document Date: 2017-10-15
Summary
42-64 - Accessing a Service Brake Light Signal on M2 Vehicles
42-64
Accessing a Service Brake Light Signal on M2 Vehicles
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Freightliner
Service Bulletin
Columbia
Coronado
> Business Class M2
Cascadia
Description of Revisions: This bulletin replaces the version dated
February 2010. The notice in solution C has been updated to state
that the additional circuit must not exceed 0.5 amps.
General Information
Body builders often need to access a 12 volt brake signal when adding components to the vehicle. Refer to
Table 1 to determine which method is best for the vehicle being modified, then follow the instructions in the appropriate procedure below.
Solution Type by Vehicle Configuration
Vehicle Configuration
Solution
Truck without a trailer power distribution
A
module (PDM), and with air brakes
Truck or tractor with a trailer PDM and air
B
brakes
Truck with hydraulic brakes
C
Table 1, Solution Type by Vehicle Configuration
Solution A: Adding a Separate Stop Lamp Switch to a Pneumatic
System
Table 2 lists the required parts for adding a stop lamp switch.
Required Parts for Solution A
Description
T-Fitting, Push-in, 1/4-inch and 1/4-inch NPT
Stop Lamp Switch, Normally Open, Closes at 3-5 psi, 1/4-inch
NPT mounting, 12 Volt, 30 amps maximum
Part Number
SMC KV2TF07 35
TDA RBE13250
Table 2, Required Parts for Solution A
1. Shut down the engine and chock the tires.
2. Drain the air system.
3. Install the stop lamp switch in the tee fitting. See Fig. 1.
4. Cut the 1/4-inch air line that runs from the double check-valve between the primary and secondary service
supply to the AMU in an easily accessible place under the hood.
5. Install the T-fitting and switch in the line.
6. Secure the switch so that it does not pinch the line, or move around excessively.
7. If a 12 volt brake signal is needed, continue with the following steps.
Refer to Fig. 2 for wiring installation, and Fig. 3 for PDM fuse locations. See Table 3 and Table 4 for required parts for this procedure.
Freightliner Service Bulletin, September 2014
Page 1
42-64
Accessing a Service Brake Light Signal on M2 Vehicles
Freightliner
Service Bulletin
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Columbia
Coronado
> Business Class M2
Cascadia
2
1
3
4
5
11/30/2009
1. Brake Valve
2. Double Check Valve
3. T-Fitting
f545626
4. Stop Lamp Switch
5. Air Line to AMU
Fig. 1, Stop Lamp Pressure Switch Installation
Page 2
Freightliner Service Bulletin, September 2014
42-64
Accessing a Service Brake Light Signal on M2 Vehicles
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Freightliner
Service Bulletin
Columbia
Coronado
> Business Class M2
Cascadia
2
4
1
3
12/01/2009
f545627
1. Wire to Bulkhead Connector (Wire 1)
2. Stop Lamp Switch
3. Wire to PDM (Wire 2)
4. PDM
Fig. 2, Wiring for Added Stop Lamp Switch
Freightliner Service Bulletin, September 2014
Page 3
42-64
Accessing a Service Brake Light Signal on M2 Vehicles
Freightliner
Service Bulletin
FLA COE
FLB COE
FLD Conventional
Business Class
3
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Columbia
Coronado
> Business Class M2
Cascadia
4
5
2
1
7
6
f545628
12/01/2009
1.
2.
3.
4.
Battery Power to 125 amp MEGA Fuse 2
Battery Power to 125 amp MEGA Fuse 1
Engine Harness Connector (green)
Forward Chassis Harness Connector (blue)
5. Forward Chassis Harness Connector (gray)
6. Frontwall Connector (black)
7. 8-Cavity Connector
Fig. 3, PDM Connector and Fuse Locations
Required Parts for Wiring a Service Brake 12 Volt Signal
Description
Part Number
Note
Wire 1: Bulkhead Connector Inside Cab (use only if cab access is required)
Female Terminal for 18-20 GA Wire
F6DB 14487 CA
—
Female Terminal for 14-16 GA Wire
F6DB 14487 BA
—
Female Terminal for 10-12 GA Wire
F6DB 14487 AA
Must use the large cavities in the connector.
Wire 1: Bulkhead Connector Outside Cab
Male Terminal for 18-20 GA Wire
F6DB 14461 DA
—
Male Terminal for 14-16 GA Wire
F6DB 14461 CA
—
Male Terminal for 10-12 GA Wire
F6DB 14461 BA
Must use the large cavities in the connector.
Wire 2: Under Hood Power Distribution Module (Main)
Female Terminal for 16-18 GA Wire
PAC 12077411
Wire seal required, P/N 23-12497-000 (Gray)
Female Terminal for 14 GA Wire
PAC 12129493
Wire seal required, P/N 23-12497-001 (Blue)
Page 4
Freightliner Service Bulletin, September 2014
42-64
Accessing a Service Brake Light Signal on M2 Vehicles
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Columbia
Coronado
> Business Class M2
Cascadia
Freightliner
Service Bulletin
Required Parts for Wiring a Service Brake 12 Volt Signal
Description
Part Number
Note
Female Terminal for 10-12 GA Wire
PAC 12077413
Wire seal required, P/N 23-12497-001 (Blue)
Table 3, Required Parts for Wiring a Service Brake 12 Volt Signal
PDM Fuses
Description
Fuse-Size, (A=Amps), Color
Fuse-Mini, 5A, Tan
Fuse-Mini, 10 A, Red
Fuse-Mini, 15A, Blue
Fuse-Mini, 20A, Yellow
Fuse-Mini, 30A, Green
Part Number
23-12537-005
23-12537-010
23-12537-015
23-12537-020
23-12537-030
Table 4, PDM Fuses
8. Connect one wire (wire 2) to the stop lamp switch and to an appropriately sized unused fuse terminal location on the main PDM. See Table 5 for spare fuse locations and corresponding PDM output pins.
Spare Fuse Locations
(PDM fuses and the corresponding PDM output pins)
PDM Fuse
Output Connector and Terminal
Blue G
F10
Green F
F11
Blue H
F12
Black H
F14
Black B
F21
Black F
Gray H
F23
Blue E
F25
Gray C
Gray A
F26
Gray B
Blue D
Table 5, Spare Fuse Locations
9. Place a fuse in the location corresponding to the terminal and connector that will be used.
10. If the 12 volt stop lamp signal is needed inside the cab, continue with step 10, otherwise connect an appropriately sized wire to the other ring terminal on the switch and route it to the load.
11. Attach a ring terminal to an appropriately sized wire (wire 1) and install it to the unused terminal of the
switch. Route the wire to the predetermined location of the bulkhead connector.
12. Insert the wire for the inside cab circuit into the corresponding location of the bulkhead connector.
13. Route this wire to the in-cab load.
Freightliner Service Bulletin, September 2014
Page 5
42-64
Freightliner
Service Bulletin
Accessing a Service Brake Light Signal on M2 Vehicles
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Columbia
Coronado
> Business Class M2
Cascadia
Solution B: Accessing Service Brake Signal at the Trailer PDM
Connector
NOTICE
Trailer wiring and service brake wiring can not exceed 30 amps total. Overloading the circuit can damage the wiring.
Refer to Fig. 4 for stop lamp signal access.
NOTE: The trailer PDM is located on the frame rail near the rear crossmember.
1. Shut down the engine and chock the tires.
2. Disconnect the gray connector from the trailer PDM.
3. Pull back the convoluted tubing and locate wire 36.
4. Splice in a connector for a new 12 volt service brake signal (stop lamp).
Solution C: Access Service Brake Signal at the Stop Lamp
Switch, Hydraulic Brakes
Refer to Fig. 5 for stop lamp signal access.
1. Shut down the engine and chock the tires.
2. Disconnect the connector at the stop lamp switch near the brake pedal.
3. Pull back the convoluted tubing, and locate wire 388L.
NOTICE
The additional circuit must not exceed 0.5 amps; the maximum carry current of the switch is 1 amp. A
higher amperage circuit may overload the original circuit. If a higher amperage circuit is required, use
this circuit to activate a relay.
4. Splice a connector into wire 388L to allow for the additional circuit.
Page 6
Freightliner Service Bulletin, September 2014
42-64
Accessing a Service Brake Light Signal on M2 Vehicles
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Freightliner
Service Bulletin
Columbia
Coronado
> Business Class M2
Cascadia
R 14E
Fuse
1
30A
Fuse
2
30A
Fuse
3
20A
Fuse
4
20A
Fuse
5
30A
MEGA
Fuse
150A
Fuse
6
30A
30
87A
87
86
85
Tail
Lamp
Relay 1
30
A
B
C
D
E
F
G
H
BLK
Connector C1
87A
87
85
86
Left
Turn Lamp
Relay 5
30
87A
87
A
B
C
D
E
F
G
H
30
87A
87
85
86
Right
Turn Lamp
Relay 2
3
GRY
Connector C2
30
87A
87
85
86
1
2
Stop
Lamp
Relay 3
30
87A
87
Trailer Module
12/01/2009
f545629
1. Gray Connector to Trailer
2. 12 Volt Service Spliced into Wire 36
3. Black Connector from Chassis Module
Fig. 4, Stop Lamp Signal Access at the Trailer PDM
Freightliner Service Bulletin, September 2014
Page 7
42-64
Freightliner
Service Bulletin
Accessing a Service Brake Light Signal on M2 Vehicles
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Columbia
Coronado
> Business Class M2
Cascadia
3
2
1
12/01/2009
1. Brake Pedal
2. Stop Lamp Switch
f545630
3. Wire Harness
Fig. 5, Accessing Service Brake Signal
Parts
Parts are available through the parts distribution center (PDC).
Warranty
This bulletin is informational only. Warranty does not apply.
Page 8
Freightliner Service Bulletin, September 2014
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
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TSB/Document ID: 42-64
Replacement Service Bulletin Number:
MFR Communication Date: 2014-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES, HYDRAULIC
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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