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Relay Wiring Diagrams - Quick Reference

Dozens of the most popular 12V relay wiring diagrams created for our site and members all in one place. If you need a relay diagram that is not included in the 76 relay wiring diagrams shown below, please search our forums or post a request for a new relay diagram in our Relay Forum.

Select a relay diagram or choose from the list below. (76 relay diagrams available)

Relay Wiring Diagrams (Last Updated: 5/4/2020)

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 Negative (Type B)
9
Door Locks - 3 Wire Positive (Type A)
10
Door Locks - 4 Wire Reversal
11
Door Locks - 5 Wire Alternating 12 Volts Positive (Type C)
12
Door Locks - Actuators / Reverse Polarity - Negative Switch/Trigger (Type D) (a)
13
Door Locks - Actuators / Reverse Polarity - Negative Switch/Trigger (Type D) (b)
14
Door Locks - Actuators / Reverse Polarity - Positive Switch/Trigger (Type D)
15
Door Locks - Add Auto Lock without an Alarm or Keyless Entry System
16
Door Locks - Add Auto Unlock without an Alarm or Keyless Entry System
17
Door Locks - Dodge Caravan (1996 - 2000) (Type H)
18
Door Locks - Dodge Caravan (2001 - 2005) (Type H)
19
Door Locks - Ford Probe (Type G)
20
Door Locks - Nissan Maxima 1995 - 1997, Double Ground Pulse Relay Diagram
21
Door Locks - Nissan's Single Wire '91-'95 using 1 relay and 1 diode (Type F)
22
Door Locks - Nissan's Single Wire '91-'95 using 2 relays (Type F)
23
Door Locks - Single Pulse to Lock and Unlock - Negative Pulse
24
Door Locks - Single Pulse to Lock and Unlock - Positive Pulse
25
Door Locks - Toyota with Child Safety Door Lock System
26
Door Locks - Vacuum Type (Type E)
27
Fog Lights Off with High Beams On
28
GM Vehicle Anti-Theft System - Passkey
29
GM Vehicle Anti-Theft System - Passkey II
30
Headlights and Parking Lights on with Wipers - Negative Input/Positive Output
31
Headlights and Parking Lights on with Wipers - Positive Input/Positive Output
32
Illuminated Entry for Vehicles with Negative Door Triggers
33
Illuminated Entry for Vehicles with Positive Door Triggers
34
Latched On/Off Output Using a Single Momentary Negative Pulse - Positive Output
35
Latched On/Off Output Using a Single Momentary Negative Pulse - Positive Output - No Diodes
36
Latched On/Off Output Using a Single Momentary Positive Pulse - Negative Output
37
Latched On/Off Output Using Two Momentary Negative Pulses - 2 Negative Outputs - Create Ground While Armed
38
Latched On/Off Output Using Two Momentary Negative Pulses - Negative Output (3 relays)
39
Latched On/Off Output Using Two Momentary Negative Pulses - Positive Output (3 relays)
40
Latched On/Off Output Using Two Momentary Positive Pulses - Negative Output (3 relays)
41
Latched On/Off Output Using Two Momentary Positive Pulses - Positive Output (2 relays, 1 diode)
42
Latched On/Off Output Using Two Momentary Positive Pulses - Positive Output (3 relays, no diode)
43
Latched On/Off Output Using Two Momentary Pulses, 1 positive, 1 negative - Positive Output (2 relays, 1 diode)
44
Latched Output - Momentary to Constant Output - Negative Input/Positive Output
45
Latched Output - Momentary to Constant Output - Positive Input/Positive Output
46
Light Flash - Basic - Negative Input/Positive Output
47
Light Flash - Two Wire (German Vehicles) - Negative Output from Alarm/Keyless Entry
48
Light Flash - Two Wire (German Vehicles) - Negative Output from Alarm/Keyless Entry (Dual Make SPST Relay)
49
Light Flash - Two Wire (German Vehicles) - Positive Output from Alarm/Keyless Entry
50
Light Flash - Two Wire (German Vehicles) - Positive Output from Alarm/Keyless Entry (Dual Make SPST Relay)
51
Light Flash - Two Wire (German Vehicles) - Weak Negative Output from Alarm/Keyless Entry
52
Light Flash - Using Siren Output
53
Momentary Negative Output when Negative Switch Turned Off
54
Momentary Negative Output when Positive Switch Turned Off
55
Momentary Positive Output when Negative Switch Turned Off
56
Momentary Positive Output when Positive Switch Turned Off
57
One Channel to Multiple Outputs
58
Power Take-Off (PTO) - Two Inputs, One Output Only Once
59
Pulsed to Steady Output (Turn signal output to steady output for duration of turn signal)
60
Radio On Until Door Opened (Retained Accessory Power) - Negative Door Trigger
61
Radio On Until Door Opened (Retained Accessory Power) - Positive Door Trigger
62
Remote Start Relay Diagram - Basic Only
63
Starter Kill - Normally Closed
64
Starter Kill - Normally Open
65
Starter Kill - Passive with Horn Output and Horn Interrupt
66
Starter Kill - Passive with Remote Turn On Lead
67
Starter Kill - Passive with Switch
68
Stereo to Bridged Mono Switched Outputs
69
Switching from Series to Parallel and Back
70
Switching from Stereo to Bridged Mono and Series to Parallel
71
Weak Negative Output to Strong Ground Output
72
Weak Positive Output to High Current Positive Output
73
Wigwag Flashing Lights - Negative Input/Positive Output
74
Wigwag Flashing Lights - Negative Input/Positive Output - Isolate Left and Right Lights
75
Wigwag Flashing Lights - Positive Input/Positive Output
76
Wigwag Flashing Lights - Positive Input/Positive Output - Isolate Left and Right Lights
Relay Deals

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