
®
4
MBS-2 Installation
Component Item Description
Quantity
Required
14401359 ABS Wiring Harness 1 yes
14401744 ABS Malfunction Lamp 1 yes
Harness w/Diagnostic
Switch
14200428 Yellow ABS Malfunction 1 yes
Lamp
14200018 Closed Back Malfunction 1* yes
Lamp Grommet
14A00049 Straight Malfunction Lamp — no
Mounting Bracket
14A00050 90° Malfunction Lamp — no
Mounting Bracket
12900570 Relay Valve 1 yes
25000945 MBS-2 Flash Code Decal 1 yes
25000985 MBS-2 Enhanced Function Decal 1 yes
25000984 MBS-2 Reverse Notice Decal 1 yes
* Two grommets required when installing the trailer warning system.
14200623 Green TL-30 Series Trailer Warning Lamp 1 no
14200002 Red TL-30 Series Trailer Warning Lamp
Supplied
in Kit
BLT00650 Bolt 1/4-20 x 3-1/2" Grade 8 (1M System) 2 yes
BLT00732 Bolt 1/4-20 x 5-1/2" Grade 8 (2M System) 2 yes
NUT00007 Nut 1/4-20 Nylon Insert Locknut 2
WSH00010 Washer 1/4" SAE Flat 2
12S00475 MBS-2 Mounting Bracket 1 yes
(optional)
281UX024
THIS TRAILER IS EQUIPPED
WITH A REVERSE
DETECTION SYSTEM.
BACKUP LIGHTS AND/OR
ALARM WILL ACTIVATE
WHEN VEHICLE IS MOVING
IN REVERSE.
DECAL PART NUMBER: WNC#25000984
NOTICE
DIAGNOSTIC SWITCH INPUT
FLASH CODE QUICK REFERENCE
TO READ CURRENT FAULTS
PRESS TWO TIMES
(HOLD 2ND PRESS FOR
THREE SECONDS)
X 2
X 4
X 5
X 6
X 7
TO READ STORED FAULT
PRESS THREE TIMES
(HOLD 3RD PRESS FOR
THREE SECONDS)
BLINK 2 TIMES
CONTINUOUS BRAKE APPLY
BLINK 4 TIMES
RS FRONT BEARING TEMPERATURE
BLINK 5 TIMES
CS FRONT BEARING TEMPERATURE
BLINK 6 TIMES
RS REAR BEARING TEMPERATURE
BLINK 7 TIMES
CS REAR BEARING TEMPERATURE
TO CLEAR STORED FAULTS
PRESS FOUR TIMES
(HOLD 4TH PRESS FOR
THREE SECONDS)
X 2
X 3
X 4
DECAL PART NUMBER: WNC#25000985
(ALLOW ONE SECOND BETWEEN PRESSES)
NOTE
DIAGNOSTIC SWITCH IS OPTIONAL ON TWL.
REFER TO MBS-2 MANUAL IF NOT PRESENT.
TRAILER WARNING LAMP (TWL)
MBS-2 ENHANCED FUNCTIONALITY
DIAGNOSTIC SWITCH INPUT FLASH CODE QUICK REFERENCE
TO READ CURRENT FAULTS
PRESS TWO TIMES
(HOLD 2ND PRESS FOR
THREE SECONDS)
X 3
X 4
X 5
X 6
X 7
X 14
X 15
TO READ STORED FAULT
PRESS THREE TIMES
(HOLD 3RD PRESS FOR
THREE SECONDS)
FLASH THREE TIMES
CURBSIDE SENSOR SIGNAL
(FRONT CURBSIDE ON 4 SENSOR SYSTEMS)
FLASH FOUR TIMES
CURBSIDE SENSOR CONNECTION
(FRONT CURBSIDE ON 4 SENSOR SYSTEMS)
FLASH FIVE TIMES
ROADSIDE SENSOR SIGNAL
(FRONT ROADSIDE ON 4 SENSOR SYSTEMS)
FLASH SIX TIMES
ROADSIDE SENSOR CONNECTION
(FRONT ROADSIDE ON 4 SENSOR SYSTEMS)
FLASH SEVEN TIMES
CURBSIDE REAR SENSOR SIGNAL
FLASH EIGHT TIMES
CURBSIDE REAR SENSOR CONNECTION
FLASH NINE TIMES
ROADSIDE REAR SENSOR SIGNAL
FLASH TEN TIMES
ROADSIDE REAR SENSOR CONNECTION
FLASH ELEVEN TIMES
SECONDARY PCM FAULT
FLASH TWELVE TIMES
PRIMARY PCM FAULT
FLASH FOURTEEN TIMES
LOW VOLTAGE TO ABS
FLASH FIFTEEN TIMES
ELECTRONIC CONTROL MODULE
TO CLEAR STORED FAULTS
PRESS FOUR TIMES
(HOLD 4TH PRESS FOR
THREE SECONDS)
X 2
X 3
X 4
X 11
X 12
X 9
X 10
X 8
(ALLOW ONE SECOND BETWEEN PRESSES)
NOTE
1) SYSTEMS WITH 1 PCM DO NOT UTILIZE FLASH
CODE 11
2) SYSTEMS WITH 2 SENSORS DO NOT UTILIZE
FLASH CODES 7-10 AND SENSORS MAY BE
LOCATED ON EITHER FRONT OR REAR AXLE
2SAND 4S SYSTEMS
4SSYSTEMS ONLY
DECAL PART NUMBER: WN#25000945
TM
MBS-2
TRAILER ANTI-LOCK BRAKE SYSTEM
A PRODUCT OF WABASH NATIONAL
Figure 3, MBS-2 System Components
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