Vision 1330B, Owner'S Manual, Page: 40 / 48

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THE 14-PIN MAIN HARNESS
H1
This wire is the main (–) ground input to the 1330
system. Be sure to connect this wire securely
to a good ground source. Most security system
installation problems result from a bad ground
connection! (The BLK wire splits into two wires
to act as the ground source of the H2 sensor har-
ness. See page 5.)
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This wire is one of four wires from the H1 main harness that forms the
H2 sensor harness, as shown on page 5. The PURPLE/WHITE wire is the
“Warning Chirps” trigger input wire from attached sensors (like the includ-
ed shock sensor). Any (–) ground signal on this wire will trigger a series of
5 siren chirps. (See page 9 in the Owner’s Guide for more information.)
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H2
H2
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The 1330B can easily interfaced with vehicles that have (–) negative “Type-
B” door locking systems. Most Asian vehicles (especially Toyota) use this
door lock scheme.
Vehicles that use a Negative door lock scheme have 3 wires at the master
door lock switch. Probe the 3 wires and you should find one constant (–) 0v
ground wire, and the other two wires will show (–) ground only when the
switch is pressed. See Fig-5 on the next page for connections.
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The 1330B does not support door locking on vehicles that
use vacuum pump door locks (most Mercedes) or vehicles that require 2
pulses for unlock. See “Type-E” on page 11.
H1
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