VLC5501 Vapormatic Immobiliser Installation Manual
8 of 21
Immobiliser blocker module wiring diagram without relays:
(Up to 12
Amp continuous current draw)
Both immobiliser blockers must be installed.
The keypad sends a signal to both immobiliser blockers, if one is not installed the other will not work. When only one circuit is
being blocked, the spare secondary blocker wires marked (7), should be taped up and insulated out of harms way.
If power to the immobiliser blockers decays below 8 Volts power to the blockers will be lost, resulting in the vehicle not
starting.
Earth wire (-):
Must be firmly secured to the vehicle’s chasses.
Power wire (+):
Must be connected to an ignition live via a 3 Amp fuse supplied. Example: when the ignition is
switched off the blocker feed wire marked (+) must be at 0 voltage. With the ignition in the ‘ON’ position the blocker
feed wire marked (+) must receive between 8 to 16 Volts D.C.
NOTE: Please read “Start Position” below.
Blocking wires (7):
Two wires are marked with (7), these are used as a continuity break (blocking circuit).
Ignition off:
No power to the two immobiliser blockers or keypad. The contacts inside the immobiliser blockers are
normally closed (N/C), therefore when the ignition is switched off the blocker allows continuity through
the two wires marked (7).
Ignition
on:
When the ignition is switched on the immobiliser blockers become live and instantly open the contacts
breaking the continuity through wires marked (7), thus breaking the circuit.
Authorisation:
When the immobiliser blockers receive a confirmation signal from the Keypad or Keypad Override Disc,
the immobiliser blockers switch off, therefore restoring the power supply and allowing the vehicle to start.
Start position:
With the ignition in the start position the voltage supply to the blocker feed wire marked (+) must not
decay below 8 volts when the engine is cranking.
Some ignition circuits are not live when the ignition
key is in the start position, if the voltage decays below 8 Volts, the blockers will drop out causing the
vehicle not to start.
Fuse Holders:
The Fuse holders supplied are of a special automotive anti-vibration type, therefore each fuse is held tighter than
normal.
Important!!! Please read all of this section carefully:
NOTE: Maximum 12 Amp current draw on blocking circuit. If the
current draw exceeds 12A you must use 30 Amp relays supplied.
NOTE: For installations where only one circuit is being blocked,
tape up wires marked (7) for ‘blocking circuit 2’. Secondary
immobiliser blocker must be wired in for the system to work
correctly.
*******
An ignition (switchable) live feed & a chassis earth are
required. Both the earth (-) & positive (+) wires to the blockers
must have a secure joint. This will limit any continuity issues
for the units use. If either wire has a loose or high resistance
joint, the unit may be re-energized which could cause the
blocked circuit to fail & the vehicle to become
immobilized.
******
