CT-3460 TW
Installation Guide
P.29
12 VDC:
This indicates the coil voltage rating. For an Automotive relay, it's usually 12 Volts DC.
40/ 30 A:
This indicates the current carrying capability of the contacts 30, 87, & 87A.
40:
Indicates that the normally closed circuit (30 and 87a) can safely handle a maximum of 40
amps of current.
30:
indicates that the normally open circuit (30 and 87) can safely handle a maximum of 30 amps
of current.
Examples:
The following examples demonstrate some of the most common uses for relays.
isolation, inversion, interruption, strengthening current, and for powering multiple wires from one
source SAFELY.
Powering multiple wires from one source safely:
Example: Powering a second Ignition
Problem: You need to power Multiple Ignition wires to remote start the vehicle, but your module
only has one Ignition output available.
Solution: You will need to add a second ignition relay to power the second ignition wire.
(Jumping
Ignition 1 to Ignition 2 is NEVER recommended. Always use a relay. The vehicle circuits are
Isolated for a reason, the wiring of the remote star module should reflect this.)
The relay connections:
85:
Connects in parallel to the Ignition 1 output from the remote start module. This becomes the
positive side of the coil.
86:
Connects to the
Ground Out when Running
wire from the remote start module. This becomes
the negative side of the coil.
87:
Connected to a Fused +12 Volts source, that is capable of supplying power for the vehicle's
second ignition wire. This becomes the source of power for the 2
nd
ignition wire.
87A:
No connection. This terminal is not used in this application.
30: Connects to the vehicle's second ignition wire.
This becomes the output
of the 2
nd
ignition relay.
Comments: The relay is only energized when the vehicle is running by remote start. When started
with the Key, the relay is not energized and the integrity of the stock system has been preserved.
Isolation:
Example: Isolating a Park light output
Problem: Some vehicle circuits need to be isolated from feedback. In some cases, when a vehicle
is remote started, feed back occurs on a circuit, and powers another device or switch, that was not
intended to be powered during the remote starts.
The following example will be a Positive (+) Park Light circuit that feeds back and activates the
windshield wipers during remote starts.
Solution: When power is applied to the OEM Park light wire it back feeds through the park light
switch, and activates the wipers. Where the connection was made from the start modules' Park
light output, and the vehicle's park light circuit, the OEM park light wire is cut to isolate the park
light switch and the actual parking lights. A Relay is added to the park light circuit so that power
from the remote start module is only sent to the parking lights and not the parking light switch.
The relay connections:
85: Connects to the +12 Volt Park light output from the remote start module. This becomes the
positive side of the coil.
