Firstech, LLC. Technical Data (CM3000)
Tachometer Sensing
1.You will need an Auto Ranging Digital Meter to test for the correct tach.
2.Most tach wires are located at the
3.The Voltage will read (AC), so you will need to set you meter accordingly.
4.With the vehicle off the voltage should read 0.00 AC.
5.Start the vehicle and at this time the voltage should fluctuate between 1 and 8 volts AC.
6.Connect the tachometer wire to the yellow/black.
7.Make sure that the Dipswitch #1 is set to the On position.
8.While the vehicle is running press the small black button on the side of the brain, the siren will chirp once if you have the correct Tach wire.
9.If the cars parking lights flash 3 times, there is a problem with the tachometer learning. Wait for 2 seconds and the cause for the error will be indicated by the number of times the parking lights flash.
Alternator Sensing
1.Just like with Tachometer sensing you will need a Auto Ranging Digital Meter to test for the correct wire.
2.Set your meter to DC voltage for this type of sensing, compared to AC voltage for the Tach sensing.
3.To find this wire you will need to locate the alternator. Look for the Stator wire, which is always located somewhere on the alternator. It will usually be a smaller gauge wire and generally by itself.
4.With the vehicle in the OFF position the voltage should read 0.00
5.Turn the key to Ignition and the voltage should read anywhere from 1 to 6 volts DC
6.Next, start the vehicle. The voltage should now read between 9 to 14 volts DC.
7.If this is the case you have found the Alternator wire, connect this to the Yellow/Black on CN 3
8.Set dipswitch #1 to the OFF position. Please note, you will not need to press the small black button on the side of the brain, it is automatic.
5