Brantz rally Instruments

Brantz Laser3 Precision Rally Computer   

Fitting to the vehicle.

Using a good quality 2 ampere mains cable, connect long insulated wires to the block terminal of the computer as in the previous section. Take care that there are no loose strands of wire left out of the connectors. Make sure you can distinguish which wires are for the sensor (screened wire is best) and which wires are for the 12 volts power input. Cut out the block connector cover plate to let in these wires, leaving a minimum of clearance so that dust does not get in, and replace the cover plate. The computer can be mounted into the vehicle using Velcro type self-adhesive strip, which reduces the amount of vibration passed from the vehicle to the computer, or 5mm threaded screws into the corner mount holes. Connect up to the distance sensor as directed in the wiring table at the back of the manual to the centre block which is marked Sensor ONLY. Terminal ++ is a 5 volt power feed going OUT to the sensor. Most 2 wire sensors do not need connection to this terminal. PP is the positive pulse INPUT terminal and -- is negative out to the sensor. Connecting PP to -- in test pulses simulates the action of the sensor. Connect the power leads to the vehicle's battery terminals directly via a 1.5 amp fuse. Note that reliable service cannot be expected if poor quality connections are used . Carefully observe the correct polarity of positive and negative. It is assumed that the fuel tank sender has one end connected to negative ground. The other end may or may not be disconnected from the rest of the vehicle and is connected to the upper Laser block connector FF. If a second auxiliary fuel gauge is required (say in the rear for filling purposes) then connect / disconnect it via a switch when actually used as it can affect accuracy.

  Brantz rally Instruments