53
T51002 E
InstallatIon, servIce and troubleshootIng Procedures
WIRING HARNESS REPLACEMENT
As discussed in WIRE HARNESS OPTIONS AND
DETAILS on page 33, various wiring harnesses are
available.
NOTICE: To avoid arcing and other electrical
damage, remove power to
trailer. Observe electrical safety
considerations when disconnecting
and connecting wires and electrical
connections.
With the standard wiring harness, replacement is
simply a matter of disconnecting the existing harness
and connecting the new one. On the standard
harness, the red wire is the indicator lamp power
lead and the blue wire is 12 VDC vehicle power. The
termination of these wires is the responsibility of the
harness installer. Terminals and connectors must be
weatherproof and corrosion prevention compound
must be used on all connectors. Refer to TMC RP 113,
114 and 120 for recommended wiring practices.
REPLACING PREMIUM ABS JUNCTION HARNESS
This procedure applies to Hendrickson components as
listed in Figure 41 on page 33.
Removal
1. Turn off all power to trailer.
2. Disconnect the following:
A. Five-pin ABS connector (Figure 41 on
page 33).
B. Five-pin power supply connector.
C. Indicator lamp connection.
D. Controller assembly connector.
Installation
For installation details and criteria, refer to ABS
JUNCTION WIRE HARNESS INSTALLATION on
page 34.
1. Connect the following:
A. Five-pin ABS connector.
B. Five-pin power supply connector.
C. Indicator lamp connector.
D. Controller assembly connector.
2. Refer to ADDING RESTRAINT TO WIRING on
page 34 to weatherproof, secure and restrain
harness and wiring as needed.
CONTROLLER ASSEMBLY REPLACEMENT
This procedure replaces the controller assembly as
one complete unit. For controller connections, refer to:
For CP -
Figure 50 on page 48
For PRO -
Figure 52 on page 50
REMOVAL
1. Exhaust air from trailer air tank. This will cause
parking brakes to be set.
2. Disconnect controller electrical connector.
3. Disconnect air supply line. Label the line
“SUPPLY” to avoid confusion when installing the
new controller assembly.
4. (PRO only) Disconnect emergency supply line.
Label the line “EMERG” to avoid confusion when
installing the new controller assembly.
5. Disconnect delivery air line. Label the line
“DELIVERY” to avoid confusion when the new
controller assembly is installed.
6. If reusing air fittings, remove air fittings from the
ports on the controller assembly.
7. Remove mounting bolts and controller assembly
enclosure from subframe.
INSTALLATION
1. Mount controller assembly enclosure to subframe
using screws removed in removal procedure.
Replace fasteners as needed.
2. If necessary, apply thread sealant to air fittings.
3. Install air line fittings on supply and delivery
ports. Use the two-wrench method shown in
Figure 19 on page 21 to avoid overtightening
the fittings.
4. (PRO only) Repeat Step 3 for Emergency port.
5. Connect air lines, labeled from removal
procedure, to the appropriate ports:
A. SUPPLY
B. DELIVERY
C. (PRO only) EMERG.
6. Connect controller assembly wire connector.
7. Recharge trailer air system.
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