What does 87a mean on a relay?
87a. High current (load) Output to other device, normally closed, pulled open when coil is energized.
How does a 5 wire relay work?
5 Pin Relay 5 pin relays provide 2 pins (85 & 86) to control the coil and 3 pins (30, 87 & 87A) which switch power between two circuits. They have both normally open and normally closed connection pins. When the coil is activated, power will be switched from the normally closed pin to the normally open pin.
What is pin 87a on a 5 pin relay?
What happens if you put a relay in backwards?
Often seen as a quick fix, using the wrong relay for the application can cause inadvertent voltage spikes. Many relays, if installed for the wrong application, could and will cause a short (Internal Relay Circuit) and most likely cause functionality issues or even damage to the vehicle computer systems.
What would you use a 5 pin relay for?
A normally open relay will switch power ON for a circuit when the coil is activated. A normally closed relay will switch power OFF for a circuit when the coil is activated. 5 pin relays provide 2 pins (85 & 86) to control the coil and 3 pins (30, 87 & 87A) which switch power between two circuits.
How does a 5 pin relay work?
5 pin relays provide 2 pins (85 & 86) to control the coil and 3 pins (30, 87 & 87A) which switch power between two circuits. They have both normally open and normally closed connection pins. When the coil is activated, power will be switched from the normally closed pin to the normally open pin.
Does a relay need to be grounded?
The relay must be on the ground side of the load when the voltages above the coil are hot. The case should be grounded. The relay can be on either side of the load for hot switch voltages that are lower than the coil.
How to wire a 12 volt relay?
To wire a 12 volt automotive relay, you need to make at least four connections. You need a couple of wires to the coil so that you could operate the relay itself. You need another two wires to attach to the relay contacts to apply power to the accessory. Take note that you adequate electrical skills in order to wire a 12V relay.
How do I wire a ballast resistor?
Connect to the ballast resistor. Cut a piece of wire long enough to reach from the other terminal of the ballast resistor to the “Bat”, “+” or “B+” terminal of the coil. Strip 1/2 inch of insulation from each end of this wire and crimp a connector onto each end.
How to wire up relay for lights?
Identify the wires of Headlights: The first step in order to wire the relay for the driving light is to identify the wires coming out of the driving lights.