Technical Service Information Bulletin
Date: February 07, 2023
Bulletin Name: REL-TSIB-025
Model: Rear Loader
Model Year: 2019 to present
Units Affected: Those with CODE controls

Rear Loader CODE controls pump power
circuit add relay to work in cold weather

Purpose:
McNeilus Truck and Manufacturing offers these instructions to help reduce the potential of over-current activity on
a specific Rear Loader CODE controls circuit during cold weather. There is the potential that during cold weather,
circuit 40 on CODE control Rear Loaders may over-current. An addition of a relay will allow the circuit to operate
without tripping the over-current.

SAFETY NOTICE

Notice:
• This bulletin should be read and understood in its
entirety before performing this procedure.
• All procedures outlined in the bulletin must be
performed by skilled service personnel. Refer to the
product service manual for descriptions of maintenance
procedures.

Perform your company’s Lockout/Tagout
procedure. If your company does not have a
Lockout/Tagout procedure, follow OSHA
1910.147 and 1910.146 Confined Space as
appropriate.

SAFETY NOTICE

Use appropriate Personal Protective
Equipment (PPE) as required by your
company.

Parts Required:
Item

PN

Description

Qty.

1

1183142

CONN,6 SOC PLUG LOCK GRN

1

2

1183143

CONN,6 SOC PLUG

1

3

1478985

RELAY, 12V 50/30AMP W/ DT04-6P

1

4

1100166

PIN,DEUTSCH 16 CONTACT

4

5

1100713

PIN-DEUTSCH,14 & 16 GA,FEMALE

2

6

0120062

TOOL,EXTRACTION,#16,DEUTSCH

1

7

0128066

WEDGELOCK,12 PIN

1

8

6KP761

CONNECTOR,12-PIN

1

9

N/A

16 GAUGE WIRE

N/A

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Procedure:
1. Perform your company’s Lockout/Tagout procedure. If your company does not have a Lockout/Tagout
procedure, follow OSHA 1910.147 and 1910.146 Confined Space as appropriate. Block truck wheels and
engage the service brake.
2. Open the covers to access the control modules on the street side of the body. Retain all hardware and parts.
3. Locate the MCC connector on the body control module.
• Remove wire 40 out of MCC position 3 using the extraction tool (6 pos, PN 0120062).
• Install wire 40 into the new connector (6 pos, PN 1183143) position 5.
4. Cut three pieces (two red wires and 1 black wire) of 16-gauge wire, each 12” long. Strip each end of the wire.
5. With the black 16-gauge wire, crimp a pin (PN 1100713) on one end and a socket (PN 1100166) on the
second end.
• Install the end with the socket into the new connector (6 pos, PN 1183143) position 3.
• Install the end with the pin into the new connector (12 pos, PN 6KP761) position 11.
6. On to one of the red wires, install a socket (PN 1100713) onto each end.
• Install the 1st end into connector MCC pos 3.
• Install the second end into the new connector (6 pos., PN 1183143) position 1.
7. With the second red wire, install a socket (PN 1100713) onto one end and pin (PN 1100166) onto the second
end.
• Install the first end into the new connector (6 pos, PN 1183143) position 6.
• Install the second end into the new connector (12 pos, PN 6KP761) position 3.
8. Install wedge lock PN 1183142 into connector PN 1183143.
9. Install wedge lock PN 0128066 into connector 6KP761.
10. Install relay PN 1478985 onto the new connector PN 1183143 and secure in the panel area.
11. Replace the cover and hardware over the control modules.
12. Remove your company’s Lockout/Tagout procedure. If your company does not have a Lockout/Tagout
procedure, follow OSHA 1910.147 and 1910.146 Confined Space as appropriate.

(888) 686-7278
www.streetsmartparts.com
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