Using A GPS Sensor With The GaugePilot Rally Computer

In preparation for the upcoming LeJog rally, my driver, Simon Arscott, sent a GaugePilot rally computer to me in order that I can get it set up for some practice time over here in the USA before we head over to the United Kingdom for the LeJog rally in December.  This past week I was able to get the GaugePilot unit setup once I had all of the needed components.  As this GaugePilot setup is for practice and to make it easy to move the GaugePilot unit from car to car when Simon takes the GaugePilot back to his shop, we decided to use a GPS sensor to drive the GaugePilot as opposed to the more commonly used wheel sensor.  This post shows how to fit the GaugePilot rally computer with the GPS sensor.

The first thing that is to be done is to download the needed wiring diagram from the GaugePilot web site.  This wiring diagram is shown below.

Wiring Diagram For The GaugePilot GPS Sensor Installation

On the back of the GaugePilot unit, there is a brown Molex electrical connection and a black Molex electrical connection.  The connection of interest for this installation is the black connection.  The 20-position black Molex connector is shown below.

20-Position Black Molex Connector

From the factory, the 20-position black connector comes pre-wired with wires in position for a wheel sensor installation.

Back Of The 20-Position Molex Connector With Standard Factory-Installed Wires

The link between the 20-position Molex connector and the GPS sensor unit is a factory-supplied wire fitting unit labelled as the GP-SA01 as shown in the wiring diagram on the top of this post.  To connect the GP-SA01 to the 20-position Molex connector, the blue wire must be installed in Position 20 and the green/blue wire must be installed in Position 6.  The connector with these additional connections in place is shown below.

GP-SA01 Wires Added The Black Molex Collector

The GPS Module used with the GaugePilot is a unit sourced from Belmog, the Belgian rally equipment retailer.  It has four wires exiting from it, but one wire, the blue wire is not used as part of the GaugePilot GPS set up.  This GPS sensor is shown below.  This sensor will generate 8,000 pulses per kilometer.

The Belmog GPS Sensor

The next step is to connect the GPS Sensor wires to the GP-SA01 wires.  I did this using a six position connection block shown below.  Note that I have connected the two ground wires from GP-SA01 to the same block position.  After the connections were made and following some quick tests, the connector block was protected using black electrical tape.

Connector Block Used To Connect The GPS Sensor To The GP-SA01 Wires

The final step is to connect the GPS antenna to the GPS sensor.  This done by removing the protective red cap over the threaded connection on the GPS sensor.  Then the antenna wire is connected just like a typical TV cable connection.  The completed connection is shown below.

GPS Antenna Connected To The GPS Sensor

Once the wiring was completed, I plugged the black 20-position Molex connector into the back of the GaugePilot unit and then placed the whole setup in my Subaru Outback with the appropriate power supply and to my great relief, the GPS driven GaugePilot worked just fine.

The GPS pulse readings can be calibrated using the installed calibration software in the GaugePilot.  The GaugePilot has the capability to adjust the initial calibration up or down by steps as small as 0.02%.  It is a very capable rally computer.

Before I close, I want to thank Nigel Cousins of GaugePilot for help with the GaugePilot.  If anyone has any questions or comments about this post or the GaugePilot, then please leave a comment below or you can send me a private email message at the following address: shanna12 at comcast dot net

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