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Chapter 2 — Installation
Use the cable ties provided while routing the cable to the location for getting
the speed signal that you previously identified. Attach the red wire of the
VSS cable to the high-speed signal wire of the vehicle’s speed sensor using
the tap splice connectors provided. The black wire is for optional use with
vehicles made before 2002. In these vehicles, it should be connected to the
low speed signal wire of the vehicle’s speed sensor or chassis ground. If you
are unsure which wire from the VSS is the high-speed signal and which is
the low-speed signal, pick one and connect the red wire to it. If the RAC
counts when the vehicle moves, you are good to go. If not, connect the red
wire to the other wire from the VSS.
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 verified 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 2.4.
5. Route the black DMI cable from the
MDS to the desired instrument location. 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 instrument 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 de-
sired location inside the vehicle. Plug
the cable into the MDS jack labeled To
DMI, as shown in Figure 2.5. 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 loca-
tion 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. 2.4 –VSS Plug-in
Fig. 2.5 – DMI Plug-in
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