Owner's Manual

120 E5000
Revision 07/23/15
1
SPDT Relay
APPLICATION: RELAY TURN-ON
The most popular use for the SPDT (single-pole, double-throw) relay
is high current on/off switching (for devices that draw up to 30 amps).
For example, you could connect a neon light tube to the relay, along
with the amplifier turn-on lead from your in-dash receiver. Then the
neon light tube will turn on whenever you turn on your in-dash
receiver.
You need a constant (unswitched) source of 12 volt power for the
relay’s red wire. You can tap into your fuse panel or run a wire directly
from your positive battery terminal. If you run a wire to your battery,
we recommend installing a 30 amp fuse in line, close to the battery
connection.
APPLICATION: RELAY TURN-OFF
Another popular application is to use the relay to turn off or disable a
device. The diagram shows using the relay in conjunction with a car
security system to disable your car’s starter system.
The diagram shows how you would use a relay with a car security
system to disable the starter when the alarm is triggered. To do this,
you cut the low-current trigger wire that runs between the ignition
switch and the starter solenoid. Connect the red and green wires to
the ignition key side of the starter trigger wire. Connect the blue wire
to the solenoid side of the starter trigger wire.
About the relay: A relay is a switch controlled by a voltage input instead of a manual action.
By sending current through the relay, you can turn a device on or off without touching the device.
IMPORTANT
Before starting, compare items on your invoice with items
received. Thoroughly check packing materials. If an item
is missing, please call Crutchfield at 1-888-955-6000.
Copyright 2015 Crutchfield Corporation
Make wiring connections following instructions on page 3.
Make wiring connections following instructions on page 3.
Green (86) - Connect to a positive switched
power source, such as the amplifier turn-on
lead or power antenna lead from you in-dash
receiver.
Red (30) - Unswitched 12 volt power source
White (87) - Connect to positive lead of light
tube or other device to be turned on.
Black (85) - Connect to chassis ground. Also
connect negative lead of device to ground.
Blue (87a) - Not used (tape off)
Tape off any unused wires.
Green (86) - Connect to key side of starter
trigger wire (along with red wire)
Red (30) - Connect to key side of starter
trigger wire (along with green wire)
White (87) - Not used (tape off)
Black (85) - Connect to starter-disable lead
from securing system (negative trigger)
Blue (87a) - Connect to solenoid side of
starter wire
Tape off any unused wires.
*120E5000*