User Manual

Guardian Field Support Manual – Section 2
51
To Find Ignition (Yellow Wire):
Connect the positive (+ve) probe of your multi-
meter to your ignition source and the negative
(-ve) probe to the ground pickup point you have
identified. Switch your multi-meter to measure
‘DC voltage (V)’.
When you turn on the vehicle key to
‘accessories’, the ignition pickup point should
display ‘12-24V’ on your multi-meter. It should
display ‘0V’ when you turn the key to ‘off’ or
‘lock’.
If the voltage doesn’t change when the key is
turned to ‘accessories’ then the pickup point is
not an ignition point. You must res-select the
ignition pick-up point.
To Find Battery (Red Wire):
Connect the positive (+ve) probe of your multi-
meter to your battery source and the negative
(-ve) probe to the ground pickup point you have
identified. Switch your multimeter to measure
‘voltage (V)’.
Ensure the key is in the ‘off’ position. With no
ignition to the vehicle the battery pickup point
should display ’12-24V’.