RAC Plus User’s Manual
2-4
other wires pass through the rewall. If you cannot locate an existing hole,
CAREFULLY drill a small hole large enough for both the VSS cable and
the +12Volt/Ground wires. EXTREME CAUTION must be taken to insure
you do not drill into anything mounted on the opposite side of the rewall
or cut any existing wiring.
Use the cable ties provided while routing the cable to the location for getting
the speed signal that you previously identied. Attach the red and black wires
of the VSS cable to the vehicle’s speed sensor wires using the tap splice
connectors provided. The red wire goes to the high-speed signal wire; the
black goes to the low speed signal wire or chassis ground.
NOTE: The tap splice connectors are supplied for convenience for ini-
tial installation. However, we recommend that once the installation is
completed and you have veried the instrument is working properly,
remove the tap splice connectors and solder the connections. Insulate
using electrical tape or silicone.
4. Plug the connector of the VSS cable
into the hole labeled VSS Input located
on the right side of the MDS, as shown
in Figure 2.2.
5. Route the black DMI cable from the MDS to the desired instrument loca-
tion. This will usually be routed between the doorpost and the dashboard.
Make sure the cable will not be pinched when closing the door. If the instru-
ment is going to be mounted to the front of the dashboard, you may want
to bring the cable straight up the front of the dash. There is adequate cable
length to allow mounting the DMI in
any desired location inside the vehicle.
Plug the cable into the MDS jack la-
beled To DMI, as shown in Figure 2.3. It
does not matter which end of the cable
is plugged into the MDS or DMI.
6. Route the Red (+12 Volts) and Black (Ground) power cables directly
to the vehicle’s battery. This can be done using the same feed through lo-
cation that was used for the VSS Cable. If, out of convenience, you elect to
obtain the +12VDC and ground from a fuse panel or other location under
the dashboard, make sure it is a constant 12 volt source and not one that
Fig. 2.2 –VSS Plug-in
Fig. 2.3 –DMI Plug-in
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