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3 Wire Negative Pulse Systems
This power doorlock system is simplest of all doorlocking systems. A Negative
pulse system will have only three wires at the doorlock switch.
Examine the wires on the back of the doorlock switch:
1)
One wire will show Ground, regardless of the switch's position.
2)
One wire will show Ground only when the switch is pushed to "Lock".
3)
One wire will show Ground only when the switch is pushed to "Unlock".
The lock & unlock wires coming out of the switch operate the vehicle’s doorlock
relays or a control unit with on-board relays, therefore the lock & unlock wires will
read Positive voltage, up to +12 Volts, when the switch is at rest. The correct
connection point is between the switches and the relays. The Red connector's
Green and Blue wires can be connected directly to the vehicle’s Negative pulse
system since only a Negative pulse is required to operate the vehicle’s on-board
doorlocking relays. If the vehicle’s Negative pulse doorlocking system requires
more than 500mA Negative output, optional relays must be used.
The following sections describe typical power doorlocking systems, which are
categorized as “3 Wire Negative Pulse”; “3 Wire Positive Pulse”, and “5 Wire
Reversing Polarity” systems
22-Gauge
Yellow/Black Wire:
(+) Brake Input
Connection Required-
The Yellow/Black wire must be connected. It is
part a critical safety feature which disables the RS unit whenever the brake pedal
is pressed. Connect the Yellow/Black wire to the brake switch wire which shows
+12 Volts when the brake pedal is pressed. The brake switch is typically located
above the brake pedal, and usually mounted to the brake pedal support bracket.
Always make this connection in a fashion ensuring its long-term reliability; solder-
ing is highly recommended. Upon completing the Yellow/Black wire's connec-
tion, thoroughly test the operation of this circuit.
22-Gauge
Dark Blue Wire:
(-) Hood Input
Connection Required-
The Hood Safety Switch must be installed and
the Dark Blue wire must be connected. This prevents operation of the RS unit
if the hood is open.
Carefully install the included pin switch so that it is open (pin down) when the
hood is shut and closed (pin up) when the hood is open. Connect the Dark Blue
wire to the pin switch and carefully route this wire through the firewall, using an
added or existing grommet, avoiding any hot or moving parts.
If there is an existing hood pin switch for an alarm system, you may use it for
the Dark Blue wire connection; but the two systems must be diode-isolated.
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