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NOTE: In order to access the X2 connector, X1 connector has to be removed.
13.3 Disconnect the X2 connector from XMC2 using the same procedure used to remove the X1 connector. See Fig. 44 and Fig. 45.

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Fig. 44, XMC2 X1 Connector Latched

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Fig. 45, XMC2 X2 Connector Fully Unlatched

13.4 Remove the X3 connector from XMC2 by squeezing the locking tab upwards while pulling the connector from the XMC. See Fig. 41 and Fig. 46.

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Fig. 46, XMC2 X3 Connector Removal

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13.5 Use a small flat screwdriver to gently pry up the top of the X3 connector, and unlock the connector,
as shown in Fig. 47.

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Fig. 47, Unlocking the XMC2 X3 Connector

13.6 Insert the brown wire from the harness into the cavity 16 of X3 connector. See Fig. 48.
NOTE: If connecting to the correct XMC (XMC2), then cavity 16 of connector X3 will be empty.

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2
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1. XMC2 X3 Connector

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2. Cavity 16
Fig. 48, Inserting the Brown Wire into Cavity 16

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13.7 Squeeze the top and bottom of the XMC2 X3 connector to lock it. Reconnect the X3 connector to
XMC2. See Fig. 49.

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Fig. 49, Engaging the Lock on the XMC2 X3 Connector

13.8 Orient the XMC2 X2 connector as shown in Fig. 50. The modular X2 connector has two terminal
banks, one gray (pins 1–26) and one black (pins 27–52). Note the locking tab location for the gray
terminal bank (pins 1–26). The gray terminal bank has to be removed for the steps that follow.
4

3
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1.
2.
3.
4.

1

2
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Gray Terminal Bank
Black Terminal Bank
Locking Tab Pins 27 to 52
Locking Tab Pins 1 to 26

Fig. 50, XMC2 X2 Connector Terminal Bank and
Locking Tab Location
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13.9 Insert a small flat screwdriver in between the locking tab for the gray terminal bank and gently pry up
on the gray terminal bank until it clears the locking tab. See Fig. 51 and Fig. 52.

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Fig. 52, Prying Up the Gray Terminal Bank

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Fig. 51, Releasing the Gray Terminal Bank

13.10 Once the gray terminal bank has cleared the locking tab, use the screwdriver on the opposite end
and push the rest of the way out of the X2 connector. See Fig. 53.

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Fig. 53, Pushing Out the Gray Terminal Bank

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13.11 Locate the brown wire in cavity 21 of the gray terminal bank. Remove this brown wire by gently pushing down on the locking tab with a terminal pin tool and pulling the wire out of the gray terminal bank.
See Fig. 54 and Fig. 55.

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Fig. 55, Removing the Brown Wire from Cavity 21

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Fig. 54, Releasing the Locking Tab for the Brown Wire
in Cavity 21

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13.12 Insert the gray terminal bank back into the XMC2 X2 connector, as shown in Fig. 56.

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Fig. 56, Inserting the Gray Terminal Bank into the
XMC2 X2 Connector

13.13 Fold and tape the brown wire removed in substep 13.11, as shown in Fig. 57 and Fig. 58. This
brown wire will no longer be used.

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Fig. 57, Folding the Brown Wire
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Fig. 58, Taping Up the Brown Wire

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13.14 Remove the black terminal bank (pins 27–52) from the XMC2 X2 connector by following the same
procedures outlined in substep 13.9. See Fig. 59 and Fig. 60.

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Fig. 60, Pushing Out the Black Terminal Bank

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Fig. 59, Releasing the Black Terminal Bank

13.15 Insert the red wire from the harness into cavity 47 of the black terminal bank. See Fig. 61.

47

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1. Cavity 47
Fig. 61, Inserting the Red Wire into Cavity 47

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13.16 Insert the black terminal bank back into the XMC2 X2 connector, as shown in Fig. 62 .
13.17 Connect the X2 and X1 connectors to the XMC2.
13.18 Secure the red wire routed to XMC2, and the brown wire removed from XMC2 using zip ties as
needed. Follow Daimler routing and clipping standards. See Fig. 63.

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Fig. 62, Inserting the Black Terminal Bank into the
XMC2 X2 Connector

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Fig. 63, Securing the Wiring Routed to the XMC2

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14.

Follow the substeps to install the wiring connections at the VPDM.
14.1 Secure the orange (or pink) wire routed to the VPDM in substep 12.7 to the main harness with zip
ties as needed. See Fig. 64.
14.2 Remove the J7 connector from the VPDM. See Fig. 65.
14.3 Remove the lock from the lower portion of the VPDM J7 connector, as shown in Fig. 66.

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Fig. 65, VPDM J7 Connector

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Fig. 64, Securing the Orange (or pink) Wire Routed to
the VPDM

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Fig. 66, Removing the Lock from the VPDM J7
Connector

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14.4 Insert the orange (or pink) wire into cavity B1 of the VPDM J7 connector. See Fig. 67.

1

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1. Cavity B1
Fig. 67, Inserting the Orange (or pink) Wire into Cavity B1 of the VPDM J7 Connector

14.5 Install the lock on the J7 connector removed in substep 14.3.
14.6 Connect the J7 connector to the VPDM.
14.7 Install the VPDM back on its bracket in the E-Vault. For more information, see Section 54.05, Subject 100 of the 47X & 49X Workshop Manual.

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14.8 Install the 10A fuse (23-12537-010) in the VPDM fuse position F75. See Fig. 68.

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Fig. 68, Installing the 10A Fuse in the VPDM Fuse Position F75

15.

Secure the relays and any excess wiring heading to the VPDM and XMC2 to the main harness with zip
ties as needed. Follow Daimler routing and clipping standards. See Fig. 69.

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Fig. 69, Securing the Relays and Excess Wiring to the
Main Harness Using Zip Ties

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16.

Follow the substeps to install the plow light switch.
16.1 Remove the MSF secondary module containing the plow light switch from the dash, but leave the
wiring connected to the module.
NOTE: For instructions to remove and install the MSF secondary module and MSF switch, see Section
54.18, Subject 110 of the 47X & 49X Workshop Manual.
16.2 Remove the existing plow light switch from the MSF secondary module and discard it. See Fig. 70.
NOTE: Actual switch location may vary from the location shown in Fig. 70.
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1. MSF Secondary Module
2. Plow Light Switch
Fig. 70, Plow Light Switch in MSF Secondary Module

16.3 Install the new plow light switch (A66-07494-040) in the same position as the switch removed in the
previous substep.

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16.4 Locate the connector on the new harness that was temporarily fed through the auxiliary dash panel
opening in substep 12.5. Now, route this connector through the opening of the MSF secondary module that contains the plow light switch. See Fig. 71.
16.5 Plug the connector into the back of the plow light switch in the MSF secondary module. See Fig. 72.

1

2

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1. MSF Secondary Module Dash Opening
2. Electrical Connector
Fig. 71, Connector from the New Harness Routed
Through the MSF Secondary Module Dash Opening
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Fig. 72, Connector Plugged into the Back of the Plow
Light Switch

16.6 Install the MSF secondary module, containing the plow light switch, on the dash panel.
See Fig. 70, page 41.

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17.

Route the remaining wires through the firewall pass-through grommet on the driver’s side.
17.1 Locate the remaining three wires (two white wires, one brown wire) that were temporarily routed
through the auxiliary dash panel opening in substep 12.5.
17.2 Route the three remaining wires from the auxiliary dash panel opening to the driver-side firewall
pass-through grommet. Secure the wiring to the main harness with zip ties as needed.
17.3 Pass the three wires through the driver-side pass-through grommet from inside the cab to the engine
compartment. Figure 73 shows the pass-through grommet from the engine compartment side with
the wires pulled through.

1
2
2

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1. Pass-Through Grommet
2. Wires
Fig. 73, Pass-Through Grommet with the Three Wires
Pulled Through

NOTE: It may be helpful to first pass a large zip tie through the grommet from the engine side, and tape the
three wires to the zip tie, then pass the three wires though the grommet by pulling on the zip tie from the
engine compartment side.
NOTE: The three wires that are passed through the grommet have terminals on the ends. These terminals
will not be used and can be cut off. Do not cut off the labels ‘BH50’ and ‘BH38’ near the terminals. These
labels are needed to correctly splice these wires to harness (TSU CT44FRT034) in a later step.

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18.

Make the 102C splice.
18.1 Unplug the 104-way bulkhead connector located on the driver’s side of the firewall in the engine compartment. See Fig. 74.
18.2 Peel back the fabric tape near the 104-way connector enough to expose several inches of the wiring
bundle. See Fig. 75.

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Fig. 75, Exposing the Wiring Bundle Near the 104-Way
Connector

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Fig. 74, 104-Way Bulkhead Connector Location

18.3 Locate the circuit 102C in the bundle of wiring leading to the 104-way connector.
18.4 Cut the wire 102C. Tape up the end that leads to the 104-way connector.
18.5 Splice the other end of 102C (the end leading away from the 104-way connector) to the brown wire
that was passed through the firewall grommet.
NOTE: For wire splices, use one of the methods outlined in Section 54.00, Subjects 100 and 110 of the
47X & 49X Workshop Manual.
18.6 Wrap the wiring bundle exposed near the 104-way connector with fabric tape.
19.

Install the wiring to the plow light connectors.
19.1 On the two white wires that were passed through the firewall grommet in substep 17.3, cut the terminals off (if not already done). Be careful not to cut the labels ‘BH50’ and ‘BH38’ on the two wires.
19.2 Splice these two white wires to the two-wire wires on the harness (TSU CT44FRT034). Be sure to
match labels ‘BH50’ and ‘BH38.’
NOTE: For wire splices, use one of the methods outlined in Section 54.00, Subjects 100 and 110 of the
47X & 49X Workshop Manual.

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SF675 A-C