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How to Install the SafetyPass Pro

SafetyPass Pro - Standard Installation Kit

SafetyPass Pro Cable Installation Video

 

big-rigs metri-pack speed sensor location 

Installation Kit fits most brands of trucks, including Freightliner, Kenworth, Peterbilt, Sterling, Western Star Volvo and others with Weather-Pack or Metri-Pack connectors.

Step 1 - Connector Identification and Location...

Locate the vehicle speed sensor (VSS) at the rear of the transmission, just in front of the U-Joint and drive shaft. Metripack connectors are found on most newer trucks after 2001. Pre 2002 trucks use Weatherpack connectors as seen below.

 

After locating the speed sensor at the rear of the transmission on the output shaft. Unplug the connector from the top of the molded speed sensor.

 

Using your thumb or index finger, gently lift up on the retaining clip and pull the Metri-Pack plug from the top of the sensor housing.

 

Use the Metripack adapter cable that came with your kit. Plugin the connector that came from you speed sensor to the mating adapter cable connector. Use the other metripack adapter cable and plug it into the top of the speed sensor. Plug in the other ends of adapter cables to mates on the Main Cable.

SafetyPass Pro XM7KT

 

Caution: The metal pins in the speed sensor housing are very fragile. Be sure to index the metal pins properly before applying pressure to seat the connector. Match up the mating connectors and apply pressure. You will hear a distinctive clicking sound as the connectors lock in to place.

To hook up to WeatherPack Connectors, mostly found on pre-2001 vehicles. Locate the speed sensor at the rear of the transmission on on the output shaft. Follow the wires from the speed sensor, normally to the top of the transmission to locate the in-line connectors.big-rig-speed-sensor-location

 


Weatherpack Connectors - most pre 2001 trucksWeatherpack inline connectors are black in color with green cable seals. Occasionally different colored seals may be used.

Weather-Pack Connectors always have round, metal, male and female pins inserted into a plastic housing.

Separate the connectors by using your thumb to lift the retaining clip and then pull the connectors apart.

Connect the Inline connectors to the Main Cable that came with your kit.

 

Two Lead or Two Sensor Installation Instructions:

Some older model trucks 1992-2006 may have more than one set of leads coming from the speed sensor or they may have two separate speed sensors.Metripack Y Adapter Cable

If this is the case, the first set of leads (two wires) will be for the speedometer and the second set will go to the truck computer (ECM). This is also true if you have two separate sensors.

On some trucks the second set of leads are actually “dummy leads” that dead-end at the Weather-Pack connectors. In this event you should follow the normal installation instructions outlined previously that apply to all "one sensor" trucks.

Use the Y Adapter Cable to connect to speedometer and ECM simultaneously. Begin installation by unplugging both speed sensor connectors. Plug the ECM leads into the mating Y adapter connectors, then plug-in other end of Y Adapter to the main cable. Attach other side of main cable to ONE speed sensor only. Use single adapter lead if necessary. The other speed sensor may be removed as a spare or left in place.

Step 2 Route Main Cable to cab Interior...Route wiring through sleeper floor

Route the Main Cable (RCA Jacks) to the cab interior.

Permanent" or "Temporary" installation?

If you are performing a permanent installation you can use cable ties to attach the Main Cable to the existing wire harness and enter the cab through the firewall.

When installing on a temporary basis, the installation wire harness can be routed into the cab by running it through one of the door openings. Make sure the wire harness is on the soft part of the door gasket and NOT in an area where metal touches metal, i.e. Door latch, hinges, alignment plate, etc.

Entry to the cab can also be made through the the sleeper floor.

Always be sure to secure loose wiring using the included cable ties that came with your installation kit. This will insure protection from moving parts located under the vehicle i.e. driveshaft, etc.

Sleeper doors are also an option. Avoid routing near extreme heat sources such as exhaust piping. Once familiar with temporary installation, 5 minute removal and installation will become common practice.


Step 3 - Install the Control Unit

The Control unit has been designed to fit into a standard cup holder located near the dash board within easy reach of the driver.

Optionally it can be placed anywhere in the cab within 3' of a 12 volt power receptacle.

Plug in the control unit to the Main Cable using the mating RCA connectors. Plug in the DC power connector to the corresponding hole on the back of the control unit and finally to the cigar lighter plug.

Be sure to read operating instructions carefully prior to using the device.

German ZF Transmission Speed Sensor and ConnectorThe German ZF Transmission has a circular 4-pin speed sensor connector at the rear of the transmission.

This connector has 3 or 4 wires connected to it. We do not have a mating connector to plug into it. So, the only way is to splice into one wire from your system.

Click here for Splicing Instructions

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