Connect relay terminal 87 to the vehicle body or battery negative terminal. How to wire your light using a relay the relay will have 4 points on it marked 30 87 85 and 86.
4 Pin Relay Diagram 4 Pin Relay Wiring 4 Pin Relay Animation 4 Pin Relay Connection
How to wire a relay. When a relay is off the common is connected to the nc normally closed. I go over what each contact of the relay is for and how to understand the schematic that is. As you can see there is absolutely no difference between the square type and the round type other than the ratings on the relay. Connect relay terminal 85 to an automotive circuit breaker. This video covers both 4 and 5 pin 12vdc relays. The no normally open connection of the relay is not connected until the relay turns on.
If you do not install a relay and use a switch you could end up overheating the switch melting the wires and reducing the current that is getting to your lights making them less bright. Use a piece of 18 gauge primary wire with a solder less female. Connect the circuit breakers other terminal to. Assortment of 12 volt relay wiring diagram. A wiring diagram is a simplified traditional pictorial depiction of an electrical circuit. Broke bastard garage 502794 views.
It reveals the components of the circuit as simplified shapes and also the power and signal connections in between the tools. Relays are used to power lights fuel pumps amplifiers car alarms and other automotive accessories. When the relay turns on the common move from nc to no. That is kind of cryptic isnt it. How to wire a relay 12v relays and how they work duration. The com common connection of a relay is the part of the relay that moves.
This pinout image is only a 2 pole diagram for room on the page purposes but you can get the picture here with this one since a 3 pole will just have 1 more set of contacts. Mounting the electric fan relay. Where to mount the relay is up to you and painless performance supplies a. How to wire a relay and why you should use them. The square relay pinout shows how the relay socket is configured for wiring. How to wire an electric fan with a relay on a classic car installing the thermostatic sending unit.
How to wire an automotive relay. The left side is the pin out of the point is sticking out from at the bottom and the the right side is showing a schematic representation of the relay circuitry. In this video i show you how to wire a 12 volt automotive bosch style relay. Otherwise they work exactly the same. Instructions for wiring a standard automotive relay with descriptions of the pin out and the schematic. Install the temperature controlled sending unit in one of the cooling passage.
Our wiring tutorial shows you how to wire the most common relays found in automobiles.
Gallery of How To Wire A Relay
