Jamar RAC Plus I - Installing the Modular Distance Sensor

To Next Page

To Previous Page

RAC Plus I User’s Manual

2-6

Installing the Modular Distance Sensor

Note: These instructions are for installing a RAC Plus I with a Modular

Distance Sensor. If you are installing a different sensor, skip this section.

1. Find a location under the vehicle

dashboard that will allow fairly easy

access to the MDS. Do Not mount the

MDS on the heater ducts or where the

heater vents will blow directly onto it.

Attach the MDS using the nylon ties or

Velcro provided, as shown in Fig. 2.3.

2. Locate the 2 wires coming from the Vehicle’s Speed Sensor (VSS).

• On most Ford and Chrysler pick-up trucks, the best place is on the

rear end differential housing using the rear ABS signal.

• On GM pick-up trucks, the best place is the VSS at the transmission.

• On many vehicles (both trucks and autos) you can go to the cruise

control signal or to the vehicle ECU which is often located under the

dashboard.

(Note: Vehicle wiring changes from year to year

and model to model. For technical support in lo-

cating the vehicle speed signal wire call JAMAR

at 215-361-2244. Your local Auto/Truck dealer

can also usually tell you where the VSS can be

located on your vehicle.)

3. Route the red and black end of the 20’ grey VSS

cable through the ﬁrewall. This can usually be done by using an existing

rubber grommet where other wires pass through the ﬁrewall. 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 op-

posite side of the ﬁrewall or cut any existing wiring.

All wires and the

MDS itself should be

kept away from heat

sources that could

cause melting.

Fig. 2.3

MDS Mounted Under Dash