Car Security and Convenience / Basic Alarm Input Connections
The wires and connections listed
below will not apply to all alarms. Some alarm
installations will require the addition of diodes,
relays, resistors,
and/or other parts. Always read your installation manual first.
Alarm Power Connections
Power Connections |
Power (+) 12V DC |
Connect to the positive terminal of the battery using the
appropriate size fuse(s). See your installation manual for more info. |
Ground (-) 12V DC |
Connect to any clean and solid chassis ground source. See
your installation manual for more info. |
Ignition (+) Input |
Connect to a source that has (+)12V DC only when the ignition
key is in the run and start positions. See your installation manual for
more info. |
|
|
Alarm Triggers
Triggers |
Door Trigger (-) Input |
Connect to the wire(s) that only shows (-) ground when any
door is open. If you're installing an alarm in a vehicle that does not
have a common door trigger wire, you will need to
connect two or more together using blocking diodes. (diagram) |
Door Trigger (+) Input |
Connect to the wire(s) that only shows (+) positive 12V DC when any
door is open. If you're installing an alarm in a vehicle that does not
have a common door trigger wire, you will need to
connect two or more together
using blocking diodes. (diagram) |
Hood / Trunk (-) Input |
Connect to a wire or switch that provides ground (-) when hood/trunk
is opened. If positive (+) 12V DC is present when hood/trunk is closed
on the same wire, use a blocking
diode with the cathode towards the switch. |
Sensor(s)(-) Input |
Connect to the (-) negative output of a sensor or triggering device.
Many alarms will have additional (-) negative inputs to accommodate additional
sensors or ports to allow their proprietary sensors to plug directly into
them. Some offer both. If the alarm only has one input and you need to connect
two or more sensors, use a blocking
diode on each output wire of each sensor. |
|
|
Additional Alarm Inputs
Additional Inputs |
Brake (+) Input |
This connection is only needed for remote start units.
Connect to the wire that only shows (+) positive
12V DC when the brake pedal is being pushed. This
switch is usually located just above or behind the
brake pedal onmost vehicles. |
Parking Brake (-) Input |
This connection is typically only needed for some
manual safe remote start units. Connect to the wire
that only shows (-) ground when the parking brake is
engaged. |
|
|
Alarm Valet / Override Switches
Valet Switches |
Valet / Override Switches |
Many of today's alarms have a port to plug the valet/ override switch(es)
directly into them. If not connect one wire of the switch(es) to ground
and the other to the specified input of the alarm. If your alarm requires
a positive input, then connect the first wire to (+) 12V DC. See your installation
manual for more info. |
|
|
Follow the12volt.com
Sunday, November 3, 2024
• Copyright © 1999-2024 the12volt.com, All Rights Reserved
• Privacy Policy & Use of Cookies
Disclaimer:
*All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please
verify all wire colors and diagrams before applying any information.