WA_DEV_FEX20_UGD_002
Rev 002
April 26, 2010
103
Fastrack Xtend User Guide
Recommendations when Using the
Fastrack Xtend on Trucks
13.2. Technical Constraints on Trucks
It is highly recommended to directly connect the power supply on the circuit breaker rather than on the
battery. The Fastrack Xtend may be damaged when starting the truck if the circuit breaker is switched
OFF (in this case, the truck ground and the battery ground will be connected through the Fastrack
Xtend as shown in the following figure).
Figure 36.
Example of an Electrical Connection That May Damage the Fastrack Xtend
The figure above gives an example of an electrical connection which may dramatically damage the
Fastrack Xtend when its ground connection is directly connected to the battery ground.
In this example, when the circuit breaker is switched OFF, the current flows through the Fastrack
Xtend and powers the electrical circuit of the truck (for example, the dashboard). Furthermore, when
the Starter Engine command is used, it will destroy the cables or the Fastrack Xtend.
Since the internal tracks of the Fastrack Xtend are not designed to support high currents (up to 60A
when starting the truck), they will be destroyed.