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Relay Diagrams: One Channel to Multiple Outputs

Dozens of the most popular relay diagrams created for our site and members all in one place. If you need a diagram that is not included in the 69 relay diagrams shown here, please search or post your request in our forums.

Select a relay diagram or choose from the list below. (69 relay diagrams available)
One Channel to Multiple Outputs
You can add multiple functions to an AUX output of an alarm or keyless entry by adding a relay in series with the output wire as shown to any switch or accessory with an output. Only one output can be active at anytime, the one first in the chain (bottom relay in diagram) will have priority, so if you wanted to have the ignition from the key to have priority over the ignition from the remote start, you would connect it to the first relay and the output of the remote start to the next and so on. Also pay attention to the top relay shown. Terminal #87a (the default output) will be active only when none of the coils of the relays are energized. There are many other accessories that can be used with this, including the remote turn on wire and/or power antenna wire of your head unit.

One Channel to Multiple Outputs
Relay Diagrams - Quick Reference (Last Updated: 1/30/2017)
1
Connecting Additional Devices to the Remote Turn On Wire
2
Constant to Momentary Output - Negative Input/Negative Output
3
Constant to Momentary Output - Negative Input/Positive Output
4
Constant to Momentary Output - Positive Input/Negative Output
5
Constant to Momentary Output - Positive Input/Positive Output
6
Convert a Negative Output to a Positive Output
7
Convert a Positive Output to a Negative Output
8
Door Locks - 3 Wire Positive
9
Door Locks - 4 Wire Reversal
10
Door Locks - 5 Wire Alternating 12 Volts Positive
11
Door Locks - Actuators / Reverse Polarity - Negative Switch/Trigger (a)
12
Door Locks - Actuators / Reverse Polarity - Negative Switch/Trigger (b)
13
Door Locks - Actuators / Reverse Polarity - Positive Switch/Trigger
14
Door Locks - Add Auto Lock without an Alarm or Keyless Entry System
15
Door Locks - Add Auto Unlock without an Alarm or Keyless Entry System
16
Door Locks - Dodge Caravan (1996 - 2000)
17
Door Locks - Dodge Caravan (2001 - 2005)
18
Door Locks - Ford Probe
19
Door Locks - Nissan Maxima 1995 - 1997, Double Ground Pulse Relay Diagram
20
Door Locks - Nissan's Single Wire '91-'95 using 1 relay and 1 diode (Type F door lock)
21
Door Locks - Nissan's Single Wire '91-'95 using 2 relays (Type F door lock)
22
Door Locks - Single Pulse to Lock and Unlock - Negative Pulse
23
Door Locks - Single Pulse to Lock and Unlock - Positive Pulse
24
Door Locks - Toyota with Child Safety Door Lock System
25
Door Locks - Vacuum Type
26
GM Vehicle Anti-Theft System - Passkey
27
GM Vehicle Anti-Theft System - Passkey II
28
Headlights and Parking Lights on with Wipers - Negative Input/Positive Output
29
Headlights and Parking Lights on with Wipers - Positive Input/Positive Output
30
Illuminated Entry for Vehicles with Negative Door Triggers
31
Illuminated Entry for Vehicles with Positive Door Triggers
32
Latched On/Off Output Using a Single Momentary Negative Pulse - Positive Output
33
Latched On/Off Output Using a Single Momentary Negative Pulse - Positive Output - No Diodes
34
Latched On/Off Output Using a Single Momentary Positive Pulse - Negative Output
35
Latched On/Off Output Using Two Momentary Negative Pulses - 2 Negative Outputs - Create Ground While Armed
36
Latched On/Off Output Using Two Momentary Negative Pulses - Negative Output (3 relays)
37
Latched On/Off Output Using Two Momentary Negative Pulses - Positive Output (3 relays)
38
Latched On/Off Output Using Two Momentary Positive Pulses - Negative Output (3 relays)
39
Latched On/Off Output Using Two Momentary Positive Pulses - Positive Output (2 relays, 1 diode)
40
Latched On/Off Output Using Two Momentary Positive Pulses - Positive Output (3 relays, no diode)
41
Latched On/Off Output Using Two Momentary Pulses, 1 positive, 1 negative - Positive Output (2 relays, 1 diode)
42
Latched Output - Momentary to Constant Output - Negative Input/Positive Output
43
Latched Output - Momentary to Constant Output - Positive Input/Positive Output
44
Light Flash - Basic - Negative Input/Positive Output
45
Light Flash - Two Wire (German Vehicles) - Negative Output from Alarm/Keyless Entry
46
Light Flash - Two Wire (German Vehicles) - Negative Output from Alarm/Keyless Entry (Dual Make SPST Relay)
47
Light Flash - Two Wire (German Vehicles) - Positive Output from Alarm/Keyless Entry
48
Light Flash - Two Wire (German Vehicles) - Positive Output from Alarm/Keyless Entry (Dual Make SPST Relay)
49
Light Flash - Two Wire (German Vehicles) - Weak Negative Output from Alarm/Keyless Entry
50
Light Flash - Using Siren Output
51
One Channel to Multiple Outputs
52
Pulsed to Steady Output (Turn signal output to steady output for duration of turn signal)
53
Radio On Until Door Opened (Retained Accessory Power) - Negative Door Trigger
54
Radio On Until Door Opened (Retained Accessory Power) - Positive Door Trigger
55
Remote Start Relay Diagram - Basic Only
56
Starter Kill - Normally Closed
57
Starter Kill - Normally Open
58
Starter Kill - Passive with Horn Output and Horn Interrupt
59
Starter Kill - Passive with Remote Turn On Lead
60
Starter Kill - Passive with Switch
61
Stereo to Bridged Mono Switched Outputs
62
Switching from Series to Parallel and Back
63
Switching from Stereo to Bridged Mono and Series to Parallel
64
Weak Negative Output to Strong Ground Output
65
Weak Positive Output to High Current Positive Output
66
Wigwag Flashing Lights - Negative Input/Positive Output
67
Wigwag Flashing Lights - Negative Input/Positive Output - Isolate Left and Right Lights
68
Wigwag Flashing Lights - Positive Input/Positive Output
69
Wigwag Flashing Lights - Positive Input/Positive Output - Isolate Left and Right Lights

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